論文

• Sou Yasuhara, Yosuke Hamasaki, Tsukasa Katayama, Takahiro Ao, Yoshiyuki Inaguma, Hajime Hojo, Maarit Karppinen, Anish Philip, Shintaro Yasui, Mitsuru Itoh. Modulating the Structure and Magnetic Properties of ε‐Fe2O3 Nanoparticles via Electrochemical Li+ Insertion, Inorganic chemistry, American Chemical Society, Vol. 59, pp. 4357-4365, Mar. 2020.
• N. Imamura, K. Singh, D. Pelloquin, Ch. Simon, T. Sasagawa, M. Karppinen, H. Yamauchi, A. Maignan. Magnetodielectric response of square-coordinated MnO2 unit in cubic BiMn7O12, Appl. Phys. Lett., 98, 072903, Feb. 2011.
• L. Karvonen, H. Yamauchi, M. Karppinen. Homologous series of SrCoO(3n-1)/n perovskites obtained through Br2 oxygenation of SrCoO2.5, Chemistry of Materials, 20, 7143-7147, 2008.
• K. Uusi-Esko, H. Yamauchi, M. Karppinen. Characterization of RMnO3 (R = Sc, Y, Dy-Lu): high-pressure synthesized metastable perovskites and their hexagonal precursor phases, Materials Chemistry and Physics, 112, 1029-1034, 2008.
• S. Kadota, M. Karppinen, T. Motohashi, H. Yamauchi. R-site substitution effect on the oxygen-storage capability of RBaCo4O7+δ, Chemistry of Materials, 20, 6378-6381, 2008.
• Y. Tanaka, M. Karppinen, J.M. Lee, H. Yamauchi. Systematic Cu L2,3-edge and O K-edge XANES spectroscopy study on the infinite-layer superconductor system, Solid State Communications, 147, 370-373, 2008.
• T. Kobayashi, T.S. Chan, R.S. Liu, J.M. Chen, Y. Tanaka, M. Karppinen, H. Yamauchi. Quantitative XANES spectroscopy study on the prototype hole- and electron-doped high-Tc superconductor systems, (La,Sr)2CuO4 and (Nd,Ce)2CuO4, Chemistry of Materials, 20, 5414-5420, 2008.
• S. Räsänen, H. Yamauchi, M. Karppinen. Oxygen absorption capability of YBaCo4O7+δ, Chemistry Letters, 37, 638-639, 2008.
• N. Imamura, H. Yamauchi, M. Karppinen. Multivariate data analysis approach to understand magnetic properties of perovskite manganese oxides, Journal of Solid State Chemistry, 181, 1195-1203, 2008.
• H. Okamoto, N. Imamura, M. Karppinen, H. Yamauchi. Neutron powder diffraction study of crystal and magnetic structures of orthorhombic LuMnO3, Solid State Communications, 156, 152-156, 2008.
• T. Motohashi, Y. Nonaka, M. Karppinen, H. Yamauchi. Fabrication and thermoelectric characteristics of [(Bi,Pb)2Ba2O4w]0.5CoO2 bulks with highly aligned grain structure, Journal of Applied Physics, 103, 33705-1-6, 2008.
• Y. Tanaka, T. Motohashi, M. Karppinen, H. Yamauchi. Conditions for superconductivity in the electron-doped copper-oxide system, (Nd1-xCex)2CuO4+δ, Journal of Solid State Chemistry, 181, 365-372, 2008.
• N. Imamura, M. Karppinen, T. Motohashi, H. Yamauchi. Magnetic and magneto-transport properties of orthorhombic perovskites, (Lu,Ca)MnO3, Physical Review B, 77, 24422-1-7, 2008.
• M. Valkeapää, M. Karppinen, T. Motohashi, R.-S. Liu, J.-M. Chen, H. Yamauchi. In-situ and ex-situ monitoring of oxygen absorption in YBaCo4O7+d, Chemistry Letters, Vol. 36, pp. 1368-1369, Nov. 2007.
• T. Motohashi, Y. Katsumata, T. Ono, R. Kanno, M. Karppinen, H. Yamauchi. Synthesis and properties of CoO2, the x = 0 end member of the LixCoO2 and NaxCoO2 systems, Chemistry of Materials, Vol. 19, pp. 5063-5066, Oct. 2007.
• M. Valkeapää, Y. Katsumata, I. Asako, T. Motohashi, T.S. Chan, R.S. Liu, J.M. Chen, H. Yamauchi, M. Karppinen. Charge compensation and oxidation in NaxCoO2-d and LixCoO2-d studied by XANES, Journal of Solid State Chemistry, Vol. 180, pp. 1608-1615, Mar. 2007.
• M. Matvejeff, J. Lindén, T. Motohashi, M. Karppinen, H. Yamauchi. Magnetic properties of spinel oxides, InFeMO4 (M = Mg, Co, and Ni), Solid State Communications, Vol. 144, pp. 249-254, 2007.
• M. Karppinen, H. Yamauchi, S. Otani, T. Fujita, T. Motohashi, Y.-H. Huang, M. Valkeapaa, H. Fjellvag. Oxygen nonstoichiometry in YBaCo4O7+d: Large low-temperature oxygen absorption/desorption capability, Chemistry of Materials, Vol. 18, pp. 490-494, 2006.
• M. Karppinen, I. Asako, T. Motohashi, H. Yamauchi. Oxygen nonstoichiometry and actual Co valence in NaxCoO2-d, Physical Review B, Vol. 71, pp. 92105/1-92105/4, 2005.
• M. Karppinen, Y. Morita, J.M. Chen, R.S. Liu, H. Yamauchi. Chemical control of high-Tc superconductivity of the triple-fluorite-layer copper oxide (Cu,Mo)Sr2(Ce,R)3Cu2O11+d (R = Y, La - Yb), Physical Review B, Vol. 72, pp. 12501/1-12501/4, 2005.
• M. Karppinen, I. Asako, T. Motohashi, H. Yamauchi. Oxidation state of cobalt in the Na_xCoO_2-d × y H₂O superconductor, Chemistry of Materials, Vol. 16, pp. 1693-1696, 2004.
• Y. Morita, T. Nagai, Y. Matsui, H. Yamauchi, M. Karppinen. High-Tc superconductivity in three-fluorite-layer copper oxides. II. (Cu,Mo)Sr₂(Ce,Y)₃Cu₂O_11+d, Physical Review B, Vol. 70, pp. 174515-174520, 2004.
• M. Karppinen, H. Fjellvag, T. Konno, Y. Morita, T. Motohashi, H. Yamauchi. Evidence for oxygen vacancies in misfit-layered calcium cobalt oxide, [CoCa₂O₃]_qCoO₂, Chemistry of Materials, Vol. 16, pp. 2790-2793, 2004.
• M. Karppinen, S. Lee, J.M. Lee, J. Poulsen, T. Nomura, S. Tajima, J.M. Chen, R.S. Liu, H. Yamauchi. Hole Doping in Pb-free and Pb-substituted (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+d Superconductors, Physical Review B, Vol. 68, pp. 54502-54506, 2003.
• J. Linden, T. Shimada, T. Motohashi, H. Yamauchi, M. Karppinen. Iron and molybdenum valences in double-perovskite (Sr,Nd)₂FeMoO₆: electron-doping effect, Solid State Communications, 2003.
• M. Karppinen, H. Yamauchi, Y. Yasukawa, J. Linden, T. S. Chan, R. S. Liu, J. M. Chen. Valence state of iron in the Sr₂Fe(Mo,W,Ta)O_6.0 double-perovskite system: An Fe K-edge and L_2,3-edge XANES study, Chemistry of Materials, Vol. 15, pp. 4118-4121, 2003.
• T. Nagai, V.P.S. Awana, E. Takayama-Muromachi, A. Yamazaki, M. Karppinen, H. Yamauchi, Y. Matsui. Superstructures due to two crystallographically distinct Co-O layers in Co-based CoSr₂YCu₂O_7-d (Ru-1212), CoSr₂(Y_3/4Ce_1/4)₂Cu₂O_9-d (Ru-1222) and CoSr₂(Y_1/3Ce_2/3)₃Cu₂O_11-d (Ru-1212) layered cuprates: A TEM study, Journal of Solid State Chemistry, 2003.
• J. Linden, P. Karen, H. Yamauchi, M. Karppinen. Valence mixing, separation and ordering in double-cell perovskite GdBaFe₂O_5+w, Journal of Magnetism and Magnetic Materials, 2003.
• J. Linden, H. Yamauchi, M. Karppinen. ⁵⁷Fe Mossbauer investigation of the Fe^II/III mixed-valence state and the B-site order in double perovskite A₂FeMoO₆, Journal of Magnetism and Magnetic Materials, 2003.
• T. Yokosawa, V.P.S. Awana, K. Kimoto, E. Takayama-Muromachi, M. Karppinen, H. Yamauchi, Y. Matsui. Electron microscope studies of nano-domain structures in Ru-based magneto-superconductors: RuSr₂Gd_1.5Ce_0.5Cu₂O_10-d (Ru-1222) and RuSr₂GdCu₂O₈ (Ru-1212), Ultramicroscopy, 2003.
• G. Peleckis, T. Motohashi, M. Karppinen, H. Yamauchi. Enhanced thermoelectric properties of Na_xCoO₂ whisker crystals , Applied Physics Letters, 2003.
• J. Linden, M. Karppinen, T. Shimada, Y. Yasukawa, H. Yamauchi. Observation of antiphase boundaries in Sr₂FeMoO₆, Physical Review B, 2003.
• T. Motohashi, T. Konno, K. Sakai, Y. Morita, T. Aoyama, S. Sugihara, M. Karppinen, H. Yamauchi. Thermoelectric Misfit-Layered Cobalt Oxides (II): Properties of Oxygen-Controlled Samples of Ca₃Co_3.95O_9+d, IUMRS-ICAM 2003 Symposia: Category C & D, No. 2, pp. 107, 2003.
• Y. Morita, T. Konno, K. Sakai, T. Motohashi, S. Sugihara, T. Fujii, I. Terasaki, H. Yamauchi, M. Karppinen. Thermoelectric Misfit-Layered Cobalt Oxides (I): Oxygen Nonstoichiometry and Cobalt Valence, IUMRS-ICAM 2003 Symposia: Category C & D, No. 2, pp. 106, 2003.
• 森田祐介, 山内尚雄, マーリット・カルピネン. 層状銅酸化物M-12s2ホモロガスシリーズの局所結晶構造制御と超伝導体化, 日本物理学会講演概要集, Vol. 58, No. 2-3, 2003.
• 守友浩, 花輪雅史, 大石泰生, 加藤健一, 中村仁, Maarit Karppinen, 山内尚雄. BaSmFe₂O₅の電荷整列転移に及ぼす格子効果, 日本物理学会講演概要集, Vol. 58, No. 2-3, 2003.
• 湯藤幸男, 杉原淳, 山本昌弘, 安川雪子, 本橋輝樹, マーリット・カルピネン, 山内尚雄. 分子軌道法によるダブルペロブスカイト酸化物の電子構造の解明, 日本物理学会講演概要集, Vol. 58, No. 2-3, 2003.
• 山内尚雄, 島田照之, 本橋輝樹, M. Karppinen. Kinetic and thermodynamics of the degree of order at the Fe/Mo site in Sr₂FeMoO₆, Meeting Abstracts of the Physical Society of Japan, Vol. 58, No. 1-3, pp. 574, 2003.
• 野村朋哉, 本橋輝樹, S. Lee, 山内尚雄, M. Karppinen. (Bi_1-xPb_x)₂Sr₂Ca₂Cu₃O_10+d単結晶の異方的超伝導特性, 第64回応用物理学会学術講演会　講演予稿集, Vol. 1, pp. 191, 2003.
• 本橋輝樹, G. Peleckis, 小野泰弘, 宮崎譲, 梶谷剛, M. Karppinen, 山内尚雄. RbをドープしたNa_xCoO₂の高温熱電変換特性, 第64回応用物理学会学術講演会　講演予稿集, Vol. 1, pp. 155, 2003.
• M. カルピネン, 野村朋哉, R.S. Liu, J.M. Chen, 山内尚雄, M. カルピネン. Bi₂Sr₂(Y_1-xCa_x)Cu₂O_8+dにおけるXANES分光および湿式化学分析法によるブロック層別ホール濃度の精密測定, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 260, 2003.
• 酒井佳, 今野拓也, 森田祐介, 青山登代美, 本橋輝樹, 山内尚雄, M. カルピネン. ミスフィット層状コバルト酸化物 (III): Pb-Sr-Co-O層状酸化物の合成と評価, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 246, 2003.
• 今野拓也, 酒井佳, 森田祐介, 本橋輝樹, 山内尚雄, M. カルピネン. ミスフィット層状コバルト酸化物 (II): 酸素量を制御したCa-Co-O層状酸化物の物性, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 246, 2003.
• 森田祐介, 今野拓也, 酒井佳, 本橋輝樹, 藤井武則, 寺崎一郎, 山内尚雄, M. カルピネン. ミスフィット層状コバルト酸化物 (I): 酸素不定比性とコバルト原子価, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 246, 2003.
• 島田照之, 山内尚雄, 本橋輝樹, M. カルピネン. Bサイトオーダー型ダブルペロブスカイトSr₂FeMoO₆セラミックスにおける飽和磁化の焼成条件依存性, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 212, 2003.
• 広田雄佑, J. リンデン, 本橋輝樹, 山内尚雄, M. カルピネン. Bサイトオーダー型ダブルペロブスカイトSr₂FeReO₆の高品質試料の作製と評価, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 211, 2003.
• 清水雄介, 八重樫信, 本橋輝樹, 山内尚雄, M. カルピネン. BaRECo₂O_5+d (RE = Nd, Eu, Ho and Y)における磁気及び磁気輸送特性の酸素不定比依存性とRE種依存性, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 211, 2003.
• 岡本裕司, 中村仁, 本橋輝樹, M. カルピネン, 山内尚雄. Aサイトオーダー型ダブルペロブスカイトBaYMn₂O_5+dの新しい合成法と酸素定比性, 第50回応用物理学関係連合講演会　講演予稿集, Vol. 1, pp. 211, 2003.
• M. Putkonen, J. Niinisto, K. Kukli, T. Sajavaara, M. Karppinen, H. Yamauchi, L. Niinisto. ZrO₂ thin films grown on silicon substrates by atomic layer deposition with Cp₂Zr(CH₃)₂ and water as precursors, Chemical Vapor Deposition, Vol. 9, pp. 207-212, 2003.
• Y. Moritomo, M. Hanawa, Y. Ohishi, K. Kato, J. Nakamura, M. Karppinen, H. Yamauchi. Physical pressure effect on the charge-ordering transition of BaSmFe₂O_5.0, Physical Review B, Vol. 68, pp. R60101-R60104, 2003.
• Y. Morita, H. Yamauchi, M. Karppinen. Superconductivity in CoSr₂(Y_1-xCa_x)Cu₂O_7+d, Solid State Communications, Vol. 127, pp. 493-498, 2003.
• T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, H. Yamauchi. Unconventional electronic transition in Na_xCoO₂ with a precisely controlled Na nonstoichiometry, Physica B, Vol. 329-333, pp. 914-915, 2003.
• J. Sugiyama, H. Itahara, J.H. Brewer, E.J. Ansaldo, T. Motohashi, M. Karppinen, H. Yamauchi. Static magnetic order in Na_0.75CoO₂ detected by muon spin rotation and relaxation, Physical Review B, Vol. 67, pp. 214420-214424, 2003.
• V.P.S. Awana, E. Takayama-Muromachi, M. Karppinen, H. Yamauchi. Magneto-superconductivity of 100-atm O₂-annealed RuSr₂Gd_1.5Ce_0.5Cu₂O_10-d, Physica C, Vol. 390, pp. 233-238, 2003.
• V.P.S. Awana, M. Karppinen, H. Yamauchi, M. Matvejeff, R.S. Liu, L.-Y. Jang. Oxygen Content and Valence of Ru in RuSr₂(Gd_0.75Ce_0.25)₂Cu₂O_10-d, Journal of Low Temperature Physics, Vol. 131, pp. 1211-1216, 2003.
• H. Yamauchi, M. Karppinen. Relationship between Local Atomic Arrangements and Properties of High-T_c Superconductive Copper Oxides, Journal of Low Temperature Physics, Vol. 131, pp. 705-717, 2003.
• Y. Morita, M. Karppinen, H. Yamauchi, R.S. Liu, J.M. Chen. XANES Study on the Evolution among Different Copper Species, Cu^I, Cu^II and Cu^III, in CuBa₂YCu₂O_6+z upon Oxygen Loading, Journal of Low Temperature Physics, Vol. 131, pp. 381-386, 2003.
• V.P.S. Awana, E. Takayama-Muromachi, S.K. Malik, W.B. Yelon, M. Karppinen, H. Yamauchi, V.V. Krishnamurthy. Cation intermixing and ordering phenomenon in M-O layer of MSr₂YCu₂O_z (M-1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study, Journal of Applied Physics, Vol. 93, pp. 8221-8223, 2003.
• M. Karppinen, K. Kotiranta, T. Nakane, S.C. Chang, J.M. Chen, R.S. Liu, H. Yamauchi. Layer-specific hole concentrations in Bi₂Sr₂(Y_1-xCa_x)Cu₂O_8+d as probed by XANES spectroscopy and coulometric redox analysis, Physical Review B, Vol. 67, pp. 134522-134527, 2003.
• T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, H. Yamauchi. Unconventional magnetic transition and transport behavior in Na_0.75CoO₂, Physical Review B, Vol. 67, pp. 64406-64410, 2003.
• C.A. Cardoso, F.M. Araujo-Moreira, V.P.S. Awana, E. Takayama-Muromachi, O.F. de Lima, H. Yamauchi, M. Karppinen. Spin glass behavior in RuSr₂Gd_1.5Ce_0.5Cu₂O_10-d, Physical Review B, Vol. 67, pp. R20407-R20410, 2003.
• T. Watanabe, N. Kiryakov, J. Poulsen, J.M. Lee, J.M. Chen, R.S. Liu, H. Yamauchi, M. Karppinen. XANES and wet-chemical analyses of the charge balance in (Hg,Pb)(Ba,Sr)₂Ca₂Cu₃O_8+d, Physica C, Vol. 392-396, pp. 93-98, 2003.
• M. Matvejeff, V.P.S. Awana, L.-Y. Jang, R.S. Liu, H. Yamauchi, M. Karppinen. Oxygen Non-stoichiometry in Ru-1212 and Ru-1222 Magnetosuperconductors, Physica C, Vol. 392-396, pp. 87-92, 2003.
• M. Karppinen, V.P.S. Awana, Y. Morita, H. Yamauchi. Oxygen Stoichiometry in Co-1212, Co-1222 and Co-1232 of the Homologous Series Co-12s2 of Category-B Layered Copper Oxides, Physica C, Vol. 392-396, pp. 82-86, 2003.
• R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, H. Yamauchi, T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, H. Yamauchi. Unconventional Magnetic Transition and Transport Behavior in Na_0.75CoO₂, Physical Review B, Vol. 67, pp. 064406 1-5, 2003.
• M. Matevejeff, V.P.S. Awana, H. Yamauchi, M. Karppinen. Oxygen non-stoichiometry in Ru-1212 and Ru-1222 magnetosuperconductors, Program & Abstracts of 15th International Symposium on Superconductivity (Nov. 11-13, 2002, Yokohama, Japan), pp. 171, 2002.
• Y. Morita, V.P.S. Awana, H. Yamauchi, M. Karppinen. Oxygen stoichiometry in a homologous series of layered copper oxides of category-B type: Co-1212, Co-1222 and Co-1232 phases, Program & Abstracts of 15th International Symposium on Superconductivity (Nov. 11-13, 2002, Yokohama, Japan), pp. 171, 2002.
• M. Karppinen, N. Kiryakov, K. Yamawaki, S. Sasaki, H. Yamauchi. Hole Distribution and Superconductivity Characteristics in (Hg,Pb)(Ba,Sr)₂Ca₂Cu₃O_8+d, Conference Handbook of 2002 International Conference on Physics and Chemistry of Molecular and Oxide Superconductors (Aug. 13-18, 2002, Hsinchu, Taiwan, R.O.C), pp. 95, 2002.
• M. Karppinen, H. Yamauchi. Hole Distribution and Superconductivity Characteristics of Multi-layered Copper Oxides , Abstracts of MRS 2002 Fall Meeting (Dec. 2-6, 2002, Boston, MA, USA), pp. 416, 2002.
• 安川雪子, J. Linden, R.S. Liu, J.M. Chen, 山内尚雄, M. Karppinen. Influence of isovalent A-site cation substitution on the iron valence in the B-site ordered double-perovskite (A,A')₂FeMoO₆ (A, A' = Ba, Sr, Ca), 日本物理学会講演概要集, Vol. 57, No. 2-3, pp. 500, 2002.
• 島田照之, 本橋輝樹, 山内尚雄, M. Karppinen. Control of the degree of order at B-cation site and the electromagnetic properties in double perovskite Sr₂FeMoO_6.0, 日本物理学会講演概要集, Vol. 57, No. 1-3, pp. 576, 2002.
• N. Kiryakov, S. Lee, M. Karppinen, H. Yamauchi. Growth of (Hg,Pb)(Ba,Sr)₂Ca₂Cu₃O_8+d Single Crystals, Superconductor Science and Technology, Vol. 15, pp. 54-59, 2002.
• J. Nakamura, J. Linden, H. Yamauchi, M. Karppinen. Hole-Doping Effect on the Verwey-Type Transition and Magnetoresistivity of Ba(Sm,Ca)Fe₂O_5+δ, Solid State Communications, Vol. 121, pp. 269-274, 2002.
• J. Johansson, J. Kostamo, M. Karppinen, L. Niinisto. Growth of Conductive Copper Sulfide Thin Films by Atomic Layer Deposition,, Journal of Materials Chemistry, Vol. 12, pp. 1022-1026, 2002.
• V.P.S. Awana, S.K. Malik, W.B. Yelon, J. Linden, M. Karppinen, H. Yamauchi. Intermixing of Fe at Cu(1)-Chain and Cu(2)-Plane Sites in FeSr₂YCu₂O_7.30 System: A Neutron Diffraction and Mossbauer Spectroscopic Study, Physica B, Vol. 312-313, pp. 62-64, 2002.
• T. Motohashi, Y. Morita, M. Karppinen, H. Yamauchi. Growth of high-quality RE-123 single crystals using BaZrO₃ crucibles, FSST News (Forum of Superconductivity Science and Technology News), Vol. 92, 2002-6-15, pp. 5-6, 2002.
• J. Linden, T. Yamamoto, H. Yamauchi, M. Karppinen. Influence of W/Ta Substitution at the Mo Site on the Fe Valence and Magnetoresistive Properties of Sr₂FeMoO₆, Physica B, Vol. 312-313, 787-788, 2002.
• M. Karppinen, H. Yamauchi. Session 3B New Materials - MgB2; Report on the 10th US-Japan Workshop, FSST News (Forum of Superconductivity Science and Technology News), pp. 21-22, 2002.
• J. Lindén, M. Karppinen, T. Shimada, Y. Yasukawa, H. Yamauchi. Observation of Antiphase Boundaries in Sr₂FeMoO₆, Physical Review B, 2002.
• M. Karppinen, K. Kotiranta, T. Nakane, S.C. Chang, J.M. Chen, R.S. Liu, H. Yamauchi. Layer-Specific Hole Concentrations in Bi₂Sr₂(Y_1-xCa_x)Cu₂O_8+δ as Probed by XANES Spectroscopy and Coulometric Redox Analysis, Physical Review B, 2002.
• M. Karppinen, H. Yamauchi, Y. Morita, M. Kitabatake, T. Motohashi, R. S. Liu, J.M. Chen. Hole-Concentration Variation in Three-CuO2-Plane Copper-Oxide Superconductor Cu-1223 as Established by Cu L-edge and O K-edge XANES Spectroscopy, Physical Review B, 2002.
• V.P.S. Awana, S. Ichihara, J. Nakamura, M. Karppinen, H. Yamauchi, J. Yang, W.B. Yelon, W.J. James, S.K. Malik. Possible Ordering of Ru and Cu in the Charge-Reservoir of Magneto-Superconductor RuSr₂GdCu₂O₈ (Ru-1212): Magnetic, Transport, and TEM Microstructural Studies, Journal of Applied Physics, Vol. 91, pp. 8501-8503, 2002.
• T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, H. Yamauchi. Unconventional Magnetic Transition and Transport Behavior in Na_0.75CoO₂, Physical Review B, 2002.
• J. Linden, T. Yamamoto, J. Nakamura, H. Yamauchi, M. Karppinen. Control of Fe valence and magnetoresistance by means of T = Ta and W substitution in Sr₂Fe(Mo_1-xT_x)_O6, Physical Review B, Vol. 66, pp. 184408-1-7, 2002.
• V.P.S. Awana, J. Nakamura, M. Karppinen, H. Yamauchi, S.K. Malik. Glass Component Induced Hysteresis/Memory Effect in Magnetoresistance of Pr_0.9Sr_0.1CoO_2.99, Journal of Magnetism and Magnetic Materials, 2002.
• M. Karppinen, N. Kiryakov, Y. Yasukawa, T. Nakane, H. Yamauchi. Isovalent Cation Substitutions to Control　the Intrinsic H_irr Characteristics of Superconductive Copper Oxides, Physica C, Vol. 382, pp. 66-71, 2002.
• M. Karppinen, T. Hosomi, H. Yamauchi. Redox State Analysis for Understanding the High-Tc Superconductivity in Highly Unstable Ba₂Ca₂Cu₃O_8-δ with Tc=124 K and Its Derivative Phase with Tc=78 K, Physica C, Vol. 382, pp. 276-282, 2002.
• V.P.S. Awana, S.K. Malik, W.B. Yelon, M. Karppinen, H. Yamauchi. Triple Perovskite CoSr₂YCu₂O_7-d and Its Peculiar Structural Features: A Neutron Diffraction Study, Physica C , Vol. 378-381, 2002.
• V.P.S. Awana, S. Ichihara, M. Karppinen, H. Yamauchi. Comparison of Magneto-Superconductive Properties of RuSr₂GdCu₂O_8-d and RuSr₂Gd_1.5Ce_0.5Cu₂O_10-d , Physica C , Vol. 378-381, pp. 249-254, 2002.
• M. Ushiki, T. Motohashi, H. Yamauchi, M. Karppinen. High-Pressure Synthesis of the Zero-Charge-Reservoir 0223 Superconductor in the Sr-Ca-Cu-O System, Physica C, Vol. 378-381, pp. 167-172, 2002.
• V.P.S. Awana, M. Karppinen, H. Yamauchi. Comment on Magnetism and Superconductivity in Rutheno Cuprates: RuSr₂GdCu₂O₈ and RuSr₂Gd_1.5Ce_0.5Cu₂O₁₀, PRAMANA - Journal of Physics , Vol. 58, pp. 809-815, 2002.
• Y. Yasukawa, H. Yamauchi, M. Karppinen. Accurate Oxygen-Content Determination Method for Decreased Sample Amounts of Superconductive and Other Functional Oxides, Applied Physics Letters, Vol. 81, pp. 502-504, 2002.
• M. Karppinen, H. Yamauchi, T. Nakane, K. Fujinami, K. Lehmus, P. Nachimuthu, R.S. Liu, J.M. Chen. XANES Study on the Generation and Distribution of Holes via Ca Substitution and O Doping in Cu(Ba_0.8Sr_0.2)₂(Yb_1-xCa_x)Cu₂O_6+z, Journal of Solid State Chemistry, Vol. 166, pp. 229-236, 2002.
• M. Karppinen, M. Matvejeff, K. Salomaki, H. Yamauchi. Oxygen Content Analysis of Functional Perovskite-Derived Cobalt Oxides, Journal of Materials Chemistry, Vol. 12, pp. 1761-1764, 2002.
• J. Linden, M. Kochi, K. Lehmus, T. Pietari, M. Karppinen, H. Yamauchi. Interplay between Cu and Fe Valences in BaR(Cu_0.5Fe_0.5)₂O_5+d Double Perovskite with R = Lu, Yb, Y, Eu, Sm, Nd and Pr, Journal of Solid State Chemistry, Vol. 166, pp. 118-127, 2002.
• Y. YASUKAWA, T. NAKANE. H. YAMAUCHI, M. KARPPINEN. Consequence of Isovalent RE Substitution to Magnetic Irreversibility In Cation-Stoichiometric CuBa₂RECu₂O_6.93±0.01, Applied Physics Letters, Vol. 78, No. 19, pp. 2917-2919, 2001.
• V.P.S. AWANA, J. NAKAMURA, J. LIND■ＥN, M. KARPPINEN, H. YAMAUCHI. Magnetoresistance Peak in the Vicinity of the Charge Disproportionation / Ordering Transition in the R_1/3Sr_2/3FeO_3-δ (R = La,Pr) Perovskite, Solid State Communications, Vol. 119, pp. 159-162, 2001.
• Y. Yasukawa, T. Nakane, M. Karppinen, H. Yamauchi. Rare-earth-ion-size Control on Magnetic Irreversibility Field in CuBa₂RECu₂O_7-δ, Physica C, Vol. 357-360, pp. 230-233, 2001.
• N. Kiryakov, S. Lee, M. Karppinen, H. Yamauchi, K. Yamawaki, S. Sasaki. Single Crystals of (Hg,Pb)(Ba,Sr)₂Ca₂Cu₃O_8+δ Grown by an Improved Encapsulation Technique, Physica C, Vol. 357-360, pp. 350-353, 2001.
• T. Nakane, M. Karppinen, H. Yamauchi. Magnetic-field Irreversibility in Superconductive Cu-m212 (m = 1, 2), Physica C, Vol. 357-360, pp. 226-229, 2001.
• V.P.S. Awana, J. Nakamura, M. Karppinen, H. Yamauchi, S.K. Malik, W.B. Yelon. Synthesis and Magnetism of Pr-based Rutheno-cuprate Compound RuSr₂PrCu₂O_8-δ, Physica C, Vol. 357-360, pp. 121-125, 2001.
• M. Karppinen, M. Kotiranta, H. Yamauchi, P. Nachimuthu, R.-S. Liu, J.M. Chen. O K-edge and Cu L₂₃-edge XANES Study on the Concentration and Distribution of Holes in the (Pb_2/3Cu_1/3)₃Sr₂(Y,Ca)Cu₂O_8+z Superconductive Phase, Physical Review B, Vol. 63, No. 18, pp. 184507-1ー184507-6, 2001.
• J. LIND■EN, T. YAMAMOTO, J. NAKAMURA, M. KARPPINEN, H. YAMAUCHI. Co-Existence of Intrinsic and Extrinsic Magnetoresistance in the Double-Perovskite Sr₂Fe (Mo_1-xW_x) O_6-w System, Applied Physics Letters, Vol. 78, No. 18, pp. 2736-2738, 2001.
• T. NAKANE, M. KARPPINEN, H. YAMAUCHI. Superconductivity Irreversibility-Field Characteristics of Layered Copper Oxides: Roles of the Two Different Blocks, Kagaku, Vol. 53, No. 4, pp. 62-63, 2001.
• T. MOTOHASHI, E. NAUJALIS, R. UEDA, K. ISAWA, M. KARPPINEN, H. YAMAUCHI. Simultaneously Enhanced Thermoelectric and Reduced Resistivity of Na_xCo₂O₄ by Controlling Na Non-Stoichiometry, Applied Physics Letters, Vol. 79, No. 10, pp. 1480-1482, 2001.
• 山内尚雄, マーリット カルピネン､ 本橋輝樹. アイソバレント元素置換法による高磁場用高温超伝導体開発, COEプロジェクト研究成果報告書-平成12年度、ダイナミック構造デザインによる材料機能の高集積開発、東京工業大学応用セラミックス研究所, pp. 179-182, 2001.
• K. Lehmus, M. Karppinen, M. Matvejeff, J. Lindén, T. Pietari, H. Yamauchi. Oxygen Stoichiometry in the (Ba0.5La0.5)(Fe1-xCux)O3-w (x = 0-1) Perovskite System, , International Journal of Inorganic Materials , Vol. 3, pp. 803-808, 2001.
• V.P.S. Awana, M. Karppinen, H. Yamauchi, S.K. Malik, W.B. Yelon, A. Mehta, A.V. Narlikar. Magnetization and Heat Capacity of R_1/3Sr_2/3FeO_3-d (R = La and Pr); , IEEE Transactions on Magnetics , Vol. 37, pp. 2163-2165, 2001.
• K. Lehmus, M. Karppinen. Application of Multivariate Data Analysis Techniques in Modeling Structure-Property Relationships of Some Superconductive Cuprates, Journal of Solid State Chemistry , Vol. 162, pp. 1-9, 2001.
• H. YAMAUCHI, M. KARPPINEN. Realization of the Highest Magnetic Irreversibility Characteristics in High T_c Superconductors by means of Multi-Site Simultaneous Doping Method, COE Research Project Report-1999, (Materials and Structures Laboratory, Tokyo Institute of Technology, pp. 154-162, 2000.
• H. Yamauchi, M. Karppinen. Impacts of the Zero Series of Homologous Series, 01(n-1)n and 02(n-1)n, Physica C , Vol. 335, pp. 273-278, 2000.
• M. Karppinen, H. Yamauchi. Hole-doping Routes for Understanding the Relationship between Atomic Arrangements and Superconductivity Properties in Multi-layered Copper Oxides, Journal of Inorganic Materials, Vol. 2, pp. 589-599, 2000.
• J. LINDÉN, J. NAKAMURA, T. PIETARI, T. TANIYAMA, M. KARPPINEN, H. YAMAUCHI. Iron Mixed-valence Compounds, BaSm(Cu0.5+xFe0.5-x)2O5+d. II: The Fe2.5+ State and Magnetic Properties, Physica C, Vol. 338, pp. 126-131, 2000.
• N. Kiryakov, S. Lee, M. Karppinen, H. Yamauchi. Growth of (Hg,Pb)(Ba,Sr)₂Ca₂Cu₃O_8+δ Single Crystals, J. Mater. Chem., 2000.
• J. Linden, M. Kochi, K. Lehmus, T. Pietari, M. Karppinen, H. Yamauchi. Layered (Cu,Fe) Oxides of Double Perovskite Structure. III: Interplay between Cu and Fe Valences in BaR(Cu_0.5Fe_0.5)₂O_5+δ with R = Lu, Yb, Y, Eu, Sm, Nd and Pr, Phys. Rev. B, 2000.
• T. Nakane, M. Karppinen, H. Yamauchi. Magnetic-Field Irreversibility in Superconductive Cu₂Ba₂(Y,Ca)Cu₂O_8±δPhase with Cu₂O₂ Double-Chain Charge Reservoir, Supercond. Sci. Technol., Vol. 13, pp. 1436-1440, 2000.
• T. Yamamoto, J. Liimatainen, J. Linden, M. Karppinen, H. Yamauchi. Novel Methods of Synthesis and Wet-chemical Redox Analysis for Double-perovskite Sr₂FeMoO_6-w, J. Mater. Chem., Vol. 10, pp. 2342-2345, 2000.
• T. Nakane, M. Karppinen, H. Yamauchi. Synthesis of Superconductive Cu₂Ba₂(Y,Ca)Cu₂O_8±δ Phase by Novel Encapsulation Technique, Supercond. Sci. Technol., Vol. 13, pp. 1382-1386, 2000.
• J. Nakamura, J. Linden, M. Karppinen, H. Yamauchi. Magnetoresistance Effect in the Fluctuating-valence BaSmFe₂O_5+w System, Appl. Phys. Lett., Vol. 77, pp. 1683-1685, 2000.
• H. Suematsu, T. Ito, T. Katsura, M. Karppinen, H. Yamauchi. Peak Effect in Critical Current Density Induced by Oxygen Deficiency in the CuBa₂Ca₃Cu4O_10+δ Superconductor, Supercond. Sci. Technol., Vol. 13, pp. 930-934, 2000.
• J. Linden, T. Yamamoto, M. Karppinen, H. Yamauchi, T. Pietari. Evidence for Valence Fluctuation of Fe in Sr₂FeMoO_6-w Double Perovskite, Appl. Phys. Lett., Vol. 76, pp. 2925-2927, 2000.
• K. Lehmus, M. Kochi, M. Karppinen, H. Yamauchi, L. Niinisto. Variation of Oxygen Stoichiometry in BaRE(Cu_0.5Fe_0.5)₂O_5+δ Double Perovskites upon Heat Treatments under Ambient and High Pressure, Int. J. Inorg. Mater., Vol. 2, pp. 203-208, 2000.
• M. Kochi, J. Linden, T. Taniyama, K. Lehmus, M. Karppinen, H. Yamauchi. Magnetic Properties, Oxygen Content and Metal Valences in BaRE(Cu_0.5Fe_0.5)₂O_5+δ withRE = Lu, Yb, Y, Eu, Sm, Nd and Pr, Physica C, Vol. 338, pp. 132-136, 2000.
• J. Nakamura, J. Linden, H. Suematsu, M. Karppinen, H. Yamauch. Iron Mixed-valent Compounds, BaSm(Cu_0.5+xFe_0.5-x)₂O_5+δ. I :Synthesis and Chemical Characterization, Physica C, Vol. 338, pp. 121-125, 2000.
• H. Yamauchi, M. Karppinen, T. Hosomi, H. Suematsu. Water-containing Phases Derived from 02(n-1)n Superconductors. II. Derivative of the Sr₂Ca₂Cu₃O_8±δ (0＾(Sr)＾223) Phase, Physica C, Vol. 338, pp. 46-51, 2000.
• H. Yamauchi, M. Karppinen, T. Hosomi, H. Fjellvag. Water-containing Phases Derived from 02(n-1)n Superconductors. I. Novel 02(n-1)n Homologous Series in the Ba-Ca-Cu-O System and the Derivative Series, Physica C, Vol. 338, pp. 38-45, 2000.
• T. Nakane, Y. Yasukawa, E.S. Otabe, T. Matsushita, M. Karppinen, H. Yamauchi. Effects of Sr Substitution on the Magnetic-field Irreversibility in Superconductive Cu(Ba_1-ySr_y)₂YbCu₂O_6+z, Physica C, Vol. 338, pp. 25-28, 2000.
• M. Karppinen, H. Yamauchi, T. Nakane, M. Kotiranta. Oxygen Non-stoichiometry and Hole Distribution in Multi-layered Copper Oxides: Understanding of the Magnetic-irreversibility Characteristics, Physica C , Vol. 338, pp. 18-24, 2000.
• H. Yamauchi, M. Karppinen. Application of High-pressure Techniques: Stabilization and Oxidation-state Control of Novel Superconductive and Related Multi-layered Copper Oxides, Supercond. Sci. Technol, Vol. 13, pp. R33-R52, 2000.
• H. Yamauchi, M. Karppinen. Proceedings of the International Discussion Meeting on Chemistry Approaches to High-T_c Superconductive Materials / 5th International Workshop on Chemical Designing and Processing of High-T_c Superconductors (Chem-HTSC V), Physica C, Vol. 338, pp. 176, 2000.
• H. Yamauchi, M. Karppinen. Realization of the Highest Magnetic Irreversibility Characteristics in High T_c Superconductors by means of Multi-site Simultaneous Doping Method, COE Research Project Report-1999 (Materials and Structures Laboratory, Tokyo Institute of Technology), Yokohama, pp. 154-162, 2000.
• M. Kotiranta, T. Nakane, M. Karppinen, H. Yamauchi, L. Niinisto. Control of Hole Distribution and Superconducting Properties in Bi₂Sr₂(Ca_1-xY_x)Cu₂O_8+δ, J. Low Temp. Phys., Vol. 117, 837-841, 1999.
• T. Hosomi, H. Suematsu, H. Fjellvag, M. Karppinen, H. Yamauchi. Identification of Superconducting Phases in the Ba-Ca-Cu-O System: an Unstable Phase with T_c ＝ 126 K and its Derivative Phase with T_c ＝ 90 K, J. Mater. Chem., Vol. 9, pp. 1141-1148, 1999.
• M. Karppinen, H. Yamauchi. Control of the Charge Inhomogeneity and High-T_c Superconducting Properties in Homologous Series of Multi-layered Copper Oxides, Mater. Sci. Eng, Vol. R 26, pp. 51-96, 1999.
• M. Karppinen, H. Yamauchi, K. Fujinami, K. Peitola, T. Nakane, H. Rundlof, R. Tellgren. Ca-Substitution and O-Doping Effects in Superconducting Cu(Ba_0.8Sr_0.2)₂(Yb_1-xCa_x)Cu₂O_6+δ Obtained from Neutron Diffraction Refinements, Phys. Rev. B, Vol. 60, pp. 4378-4385, 1999.
• K. Peitola, M. Karppinen, H. Rundlof, R. Tellgren, H. Yamauchi, L. Niinisto. Structural Changes Related to Changes in Oxygen Stoichiometry in the Ba_1-yCuO_2+δ(CO₂)_x System as Determined by Powder X-ray and Neutron Diffraction, J. Mater. Chem., Vol. 9, pp. 2599-2603, 1999.
• J. Linden, P. Karen, A. Kjekshus, J. Miettinen, T. Pietari, M. Karppinen. Valence-state Mixing and Separation in SmBaFe₂O_5+w, Phys. Rev. B., Vol. 60, pp. 15251-15260, 1999.
• J. Linden, K. Isawa, J. Miettinen, M. Karppinen, H. Yamauchi. ＾151＾Eu Mossbauer Study of the CuEuO_2+δ Delafossite, Physica B, Vol. 271, pp. 223-229, 1999.
• T. Hosomi, H. Suematsu, M. Karppinen, H. Yamauchi. Magnetic Irreversibility Characteristics of Highly Unstable Superconducting Ba₂Ca₂Cu₃O_y and Its Derivative Phase, Physica C, Vol. 324, pp. 65-70, 1999.
• K. Peitola, M. Kochi, M. Karppinen, H. Yamauchi, L. Niinisto, J. Linden. Oxygen Stoichiometry in BaRE(Cu_0.5Fe_0.5)₂O_5+δ Compounds with Perovskite or Double Perovskite Structure, J. Low Temp. Phys., Vol. 117, pp. 861-865, 1999.
• M. Karppinen, H. Yamauchi. The Doping Routes and Distribution of Holes in Layered Cuprates: A Novel Bond-valence Approach, Philos. Mag. B , Vol. 79, pp. 343-366, 1999.
• J. Linden, P. Karen, A. Kjekshus, J. Miettinen, M. Karppinen. Partial Oxygen Ordering in Cubic Perovskite REBa₂Fe₃O_8+w (RE = Gd, Eu, Sm, Nd), J. Solid State Chem., Vol. 144, pp. 348-404, 1999.
• H. Yamauchi, M. Karppinen. Control of Carrier Distribution for Tailoring Superconducting Properties of Layered Cuprates, J. Low Temp. Phys. , Vol. 117, pp. 813-822, 1999.
• T. Matsushita, E.S. Otabe, T. Nakane, M. Karppinen, H. Yamauchi. Evaluation of Irreversible Property in Superconducting Cu(Ba_0.8Sr_0.2)₂YbCu₂O_6+z Powder, Physica C, Vol. 322, pp. 100-104, 1999.
• H. Suematsu, M. Kawano, T. Onda, T. Akao, M. Hayakawa, H. Ogiwara, M. Karppinen, H. Yamauchi. Peak Effect in Critical Current Density Induced by Oxygen Non-stoichiometry in Cation-stoichiometric SmBa₂Cu₃O_7-δ Superconductor, Physica C, Vol. 324, pp. 161-171, 1999.
• M. Karppinen, H. Yamauchi, T. Hosomi, H. Suematsu, H. Fjellvag. Superconducting Cuprates with Charge Reservoir Consisting of Either Peroxide-type Oxygen or H₂O, J. Low Temp. Phys., Vol. 117, pp. 843-847, 1999.
• K. Peitola, K. Fujinami, M. Karppinen, H. Yamauchi, L. Niinisto. Stoichiometry and Copper Valence in the Ba_1-yCuO_2+δ System, J. Mater. Chem., Vol. 9, pp. 465-469, 1999.
• T. Nakane, K. Fujinami, M. Karppinen, H. Yamauchi. Magnetic-field Irreversibility of Cu(Ba_0.8Sr_0.2)₂(Yb_1-xCa_x)Cu₂O_6+z with Controlled Distribution of Holes, Supercond. Sci. Technol., Vol. 12, pp. 242-247, 1999.
• K. Fujinami, H. Suematsu, M. Karppinen, H. Yamauchi. Effect of Overdoping on the Irreversibility Field and Critical Current Density of the HgBa₂Ca₂Cu₃O_8+z Superconductor, Physica C, Vol. 307, pp. 202-208, 1998.
• M. Nagase, J. Linden, H. Suematsu, M. Karppinen, H. Yamauchi. Layered (Cu,Fe) Oxides of Double Perovskite Structure. II: Extension of Solid-solubility of Copper in (Ba,La)Y(Cu_0.5+xFe_0.5-x)₂O_5+δ via High-pressure Heat Treatment, Phys. Rev. B, Vol. 59, pp. 1377-1382, 1998.
• M. Nagase, J. Linden, J. Miettinen, M. Karppinen, H. Yamauchi. Layered (Cu,Fe) Oxides of Double Perovskite Structure: Correlation between Structural and Magnetic-property Changes in BaY(Cu_0.5Fe_0.5)₂O_5+δ upon High-pressure Heat Treatment, Phys. Rev. B, Vol. 58, pp. 3371-3376, 1998.
• T. Ito, H. Suematsu, M. Karppinen, H. Yamauchi. Oxygen Content in High-pressure Synthesized CuBa₂Ca₂Cu₃O_8+δ (Cu-1234) Superconductor, Physica C, Vol. 308, pp. 198-202, 1998.
• T. Ito, H. Suematsu, K. Isawa, M. Karppinen, H. Yamauchi. Optimization of the Synthesis and Tuning the Oxygen Content of the CuBa₂Ca₂Cu₃O_8+δ(Cu-1223:P) Superconductor, Physica C, Vol. 308, pp. 9-15, 1998.
• H. Yamauchi, M. Karppinen, K. Fujinami, T. Ito, H. Suematsu, H. Sakata, K. Matsuura, K. Isawa. Strongly Overdoped States and Irreversibility-field Characteristics of the M-1223 [M = Hg, (Cu,C)] Superconducting Cuprates, Supercond. Sci. Technol., Vol. 11, pp. 1006-1010, 1998.
• J. Linden, A. Kjekshus, P. Karen, J. Miettinen, M. Karppinen. A ⁵⁷Fe Mossbauer Study of REBa₂Fe₃O_8+w Triple Perovskites with Varied Oxygen Content (RE = Dy, Er and Y), J. Solid State Chem., Vol. 139, pp. 168-175, 1998.
• J. Linden, M. Lippmaa, P. Karen, A. Kjekshus, M. Karppinen. A ⁵⁷Fe Mossbauer Study of the Cubic Perovskite-type Phase LaBa₂Fe₃O_8+w, (-0.20 < w < 0.83), J. Solid State Chem., Vol. 138, pp. 87-97, 1998.
• K. Fujinami, M. Karppinen, H. Yamauchi. Investigation of Different Hole-doping Routes in Cu(Ba,Sr)₂(Yb_1-xCa_x)Cu₂O_6+z, Physica C, Vol. 300, pp. 17-25, 1998.
• M. Kawano, K. Fujinami, H. Suematsu, T. Onda, M. Hayakawa, M. Karppinen, H. Ogiwara andH. Yamauchi. Peak Effect of Critical Current Density in Stoichiometric SmBa₂Cu₃O_y Sample, Mater. Sci. Eng. B, Vol. 54, pp. 123-127, 1998.
• H. Suematsu, T. Ito, H. Sakata, K. Kurashima, Y. Bando, M. Karppinen, H. Yamauchi. Simultaneous EDS and EELS Studies on Carbon in CuBa₂Ca₃Cu₄O_x Superconductor, Mater. Sci. Eng. B, Vol. 54, pp. 117-122, 1998.
• T. Ito, H. Suematsu, H. Sakata, O. Fukunaga, M. Karppinen, H. Yamauchi. High-pressure Synthesis of CuBa₂Ca_n-1Cu_nO_x (n = 3, 4) Superconductors without External Oxidizing Agents, Mater. Sci. Eng. B, Vol. 54, pp. 112-116, 1998.
• K. Fujinami, H. Suematsu, M. Karppinen, H. Yamauchi. Ca Doping Effect on Superconductivity in (Yb_1-xCa_x)(Ba_0.8Sr_0.2)₂Cu₃O_6+z, Mater. Sci. Eng. B, Vol. 54, pp. 108-111, 1998.
• H. Yamauchi, M. Karppinen. Hole-doping of the CuO₂ Planes in High-Tc Superconductors, Mater. Sci. Eng. B, Vol. 54, pp. 92-97, 1998.
• H. Yamauchi, M. Karppinen. Net Holes and Superconductivity in the Members with n> 3 of Homologous Series,Tl-and Hg-m2(n-1)n, J. Supercond., Vol. 11, pp. 43-46, 1998.
• M. Karppinen, H. Yamauchi. Metal Valences and Hole-doping Routes in Tl- and Hg-based Superconducting Cuprates, J. Supercond., Vol. 11, pp. 39-42, 1998.
• M. Karppinen, H. Yamauchi. Hole Doping and Magnetic Irreversibility in the Cu-12(n-1)n:P Series of Layered Superconducting Cuprates, International Workshop on Chemical Designing and Processing of High-Tc Superconductors IV (Chem - HTSC IV), Nov. 12-13, 1998, Tokyo Institute of Technology, Yokohama, Japan, Extended Abstracts, pp. 5-8, 1998.
• T. Hosomi, H. Suematsu, H. Fjellvag, M. Karppinen, H. Yamauchi. Unstable Superconducting Phases in the Ba-Ca-Cu-O System, International Workshop on Chemical Designing and Processing of High-Tc Superconductors IV (Chem - HTSC IV), Nov. 12-13, 1998, Tokyo Institute of Technology, Yokohama, Japan, Extended Abstracts, pp. 51-54, 1998.
• H. YAMAUCHI, M. KARPPINEN, K. FUJINAMI, T. ITO, T. AKAO, S. R. LEE, H. SUEMATSU. The Over-Doped State in the M-1223 (M=Hg,Cu) Superconducting Cuprates, Book of Abstracts of the 5th International Workshop 'High-Temperature Superconductors and Novel Inorganic Materials Engineering (MSU - HTSC V), pp. OR-34, 1998.
• M. KARPPINEN, H. YAMAUCHI, K. FUJINAMI, T. NAKANE, K. PEITOLA, L. NIINISTO, H. RUNDLOF, R. TELLGREN, J. M. CHEN, R. S. LIU. Hole Doping Mechanism in HTSC: Neutron Diffraction and XANES Study on the Hole Generation and Distribution in the Cu(Ba,Sr)₂(Yb_1-xCa_x)Cu₂O_6+z System, Book of Abstracts of the 5th International Workshop 'High-Temperature Superconductors and Novel Inorganic Materials Engineering (MSU - HTSC V)', pp. W-13, 1998.
• M. Karppinen, H. Yamauchi, H. Suematsu, O. Fukunaga. Synthesis and Characterization of LaCuO_3-y Phases with Various Oxygen Contents, Superlatt. Microstructr., Vol. 21A, pp. 41-54, 1997.
• H. YAMAUCHI, M. KARPPINEN. Superconducting Cuprate Materials: Structures, Carrier Doping and Synthesis, The 2nd Seminar of Superconductivity and Cryogenics for Young Researchers; Organized by North Branch of Cryogenic Association of Japan, pp. 23-41, 1997.
• M. Kawano, H. Suematsu, T. Onda, M. Hayakawa, H. Ogiwara, M. Karppinen and. Peak Effect in <J_c> of the Cation-stoichiometric SmBa₂Cu₃O_y Superconductor, Appl. Supercond., Vol. 5, pp. 119-125, 1997.
• T. Karlemo, M. Karppinen, L. Niinisto, J. Linden, M. Lippmaa. Annealing Characteristics and Calcium Doping Effects in the Superconducting, Physica C , Vol. 292, pp. 225-232, 1997.
• K. Fujinami, T. Ito, H. Suematsu, K. Matsuura, M. Karppinen, H. Yamauchi. Establishment of Strongly Overdoped States in the Hg-1223 Superconductor, Phys. Rev.B, Vol. 56, pp. 14790-14796, 1997.
• K. Isawa, Y. Yaegashi, M. Komatsu, M. Nagano, S. Sudo, M. Karppinen, H. Yamauchi. Synthesis of Delafossite-derived Phases, <R>CuO_2+δ with <R> = Y, La, Nd, Sm and Eu, and Observation of Spin-gap-like Behavior, Phys. Rev.B, Vol. 56, pp. 3457-3466, 1997.
• M. Karppinen, H. Yamauchi, H. Suematsu, K. Isawa, M. Nagano, R. Itti, O. Fukunaga. Control on the Copper Valence and Properties by Oxygen Content Adjustment inthe LaCuO_3-y System (0 < y < 0.5), J. Solid State Chem., Vol. 130, pp. 213-222, 1997.
• H. Yamauchi, M. Karppinen. Structural Classification of Superconducting Cuprates, Superlatt. Microstructr., Vol. 21A, pp. 128-152, 1997.
• H. Yamauchi, M. Karppinen. Superconducting Materials, Textbook of Introductory Lectures on Electronic Ceramics, The Ceramics Society of Japan, Tokyo, pp. 181-198, 1997.
• H. Yamauchi, M. Karppinen. Review on International Symposium on Superconductivity 1996 (ISS'96): Chemistry Session, ISTEC Journal, Vol. 10, No. 1, pp. 5-6, 1997.
• M. Karppinen, L. Niinisto, H. Yamauchi. Studies on the Oxygen Stoichiometry in Superconducting Cuprates by Thermoanalytical Methods, J. Therm. Anal. , Vol. 48, pp. 1123-1141, 1997.
• J. Linden, M. Lippmaa, T. Karlemo, M. Karppinen, L. Niinisto. Investigations of the Pb₂Sr₂Y_1-xEu_xCu₃O_8+d System by ＾151＾Eu Mossbauer Resonance and X-ray Diffraction, Supercond. Sci. Technol., Vol. 9, pp. 399-404, 1996.
• H. Yamauchi, M. Karppinen, T. Ito, H. Suematsu, O. Fukunaga. Oxygen Stability and Thermal Decomposition of Superconducting (Cu,C)Ba₂Ca₃Cu₄O_z Samples, Physica C, Vol. 266, pp. 345-352, 1996.
• M. Karppinen, A. Fukuoka, L. Niinisto, H. Yamauchi. Determination of Oxygen Content and Metal Valences in Oxide Superconductors by Chemical Methods, Supercond. Sci. Technol., Vol. 9, pp. 121-135, 1996.
• M. Karppinen, H. Yamauchi, L. Niinisto. Various Thermogravimetric Approaches to Oxygen Stoichiometry in Superconducting and Related Cuprates, 15th Nordic Symposium for Thermal Analysis and Calorimetry, Nov. 13-15, 1996, Helsinki, Finland, Extended Abstracts , pp. 4, 1996.
• M. Karppinen, H. Yamauchi, T. Ito, H. Suematsu, O. Fukunaga. High-pressure Synthesis and Thermal Decomposition of LaCuO₃, Mater. Sci. Eng. B, Vol. 41, pp. 59-62, 1996.
• M. Karppinen, H. Yamauchi, H. Suematsu, O. Fukunaga. Synthesis of Various LaCuO_3-y Phases by a High-pressure Technique and Subsequent Post-annealing Treatments, Physica C, Vol. 264, pp. 268-274, 1996.
• H. Yamauchi, M. Karppinen, S. Tanaka. Homologous Series of Layered Cuprates, Physica C , Vol. 263, pp. 146-150, 1996.
• A. Fukuoka, M. Karppinen, M. Itoh, K. Hamada, H. Yamauchi. Determination of Oxygen Contents and Cation Valences in the Superconducting Bismuth and Thallium Cuprates, J. Supercond., Vol. 8, pp. 31-35, 1995.
• A. Fukuoka, M. Karppinen, M. Itoh, K. Hamada, H. Yamauchi. Determination of Oxygen Content and Cation Valences in Superconducting Tl-based Cuprates by a Wet Chemical Method, Phys. Rev. B , Vol. 51, pp. 12759-12762, 1995.
• M. Karppinen, J. Linden, J. Valo, A. Kareiva, V. Kozlov, K. Terryll, L. Niinisto, M. Leskela, K.V. Rao. Iron Substitution Effects in YBa₂Cu₄O₈ Synthesized by a Sol-gel Technique, Supercond. Sci. Technol., Vol. 8, pp. 79-84, 1995.
• M. Karppinen, A. Kareiva, J. Linden, M. Lippmaa, L. Niinisto. Sol-gel Synthesis and Characterization of Superconducting (Y_1-xEu_x)Ba₂(Cu_1-y＾57＾Fe_y)₄O₈ Samples, J. All. Comp., Vol. 225, 586-590, 1995.
• H. Yamauchi, M. Karppinen. Classification of HTSC Cuprates, and Design and Synthesis of the Members of Novel Homologous Series, Proc. 7th US-Japan Workshop on High-Tc Superconductors, Tsukuba, Japan, Oct. 24-25, 1995, K. Tachikawa, K. Kitazawa, K. Togano and E. Muromachi (Eds.), The Society of Non-traditional Technology, Tokyo , pp. 362-376, 1995.
• J. Holsa, M. Karppinen, E. Kestila. Comparative Study of the Crystal Field Effects in Rare Earth Oxynitrates, J. All. Comp., Vol. 207-208, pp. 65-68, 1994.
• A. Kareiva, M. Karppinen, L. Niinisto. Sol-gel Synthesis of Superconducting YBa₂Cu₄O₈ Using Acetate and Tartrate Precursors, J. Mater. Chem., Vol. 4, pp. 1267-1270, 1994.
• J. Linden, M. Lippmaa, J. Miettinen, I. Tittonen, T. Katila, A. Kareiva, M. Karppinen, L. Niinisto, J. Valo, M. Leskela. Europium Substitution Effects in Superconducting YBa₂Cu₄O₈ Synthesized under One Atmosphere Oxygen Pressure, Phys. Rev. B, Vol. 50, pp. 4154-4158, 1994.
• J. Linden, M. Lippmaa, J. Miettinen, I. Tittonen, T. Katila, M. Karppinen, L. Niinisto. ＾151＾Eu Mossbauer Spectroscopy and X-ray Diffraction Studies on the Pb₂Ba₂EuCu₃O_8+y System, Phys. Rev. B, Vol. 50, pp. 16040-16043, 1994.
• J. Linden, M. Lippmaa, J. Miettinen, I. Tittonen, T. Katila, M. Karppinen, L. Niinisto, A. Nara, H. Yamauchi. Precise Determination of the Hyperfine Parameters of Europium in Multifluorite Perovskites by ＾151＾Eu Mossbauer Spectroscopy, Phys. Rev. B, Vol. 49, pp. 15280-15286, 1994.
• J. Holsa, E. Kestila, M. Karppinen. Crystal Fields in Eu＾3+＾ Doped Rare Earth Oxynitrates: Application of the Descending Symmetry Method, Z. Phys. Chem., Vol. 187, pp. 61-71, 1994.
• J. LINDEN, T. KARLEMO, M. KARPPINEN, T. KATILA, M. LIPPMAA, A. NARA, L. NINISTO, K. ULLAKKO, H. YAMAUCHI. Application of ¹⁵¹Eu Mossbauer Spectroscopy to Studies of Electric Field Gradients in High-Temperature Superconductors, Hyperfine Interactions, Vol. 93, pp. 1635-1639, 1993.
• M. KARPPINEN, H. YAMAUCHI, S. TANAKA . An Improved Coulometric Titration Method for the Oxygen Content and Valence Determinations in Bismuth and Lead Cuprates , Journal of Solid State Chemistry , Vol. 104, No. 2, pp. 276-281, 1993.
• Maarit Karppinen. Determination of Oxygen Contents and Valences of Copper and Other Cations in Superconducting Cuprates, ISTEC Journal , Vol. 6, No. 2, pp. 15-20, 1993.
• M. KARPPINEN, A. FUKUOKA, J. WANG, S. TAKANO, M. WAKATA, T. IKEMACHI, H. YAMAUCHI. A Novel Method for the Determination of the Oxygen Contents in the Superconducting Thallium Cuprates , Superconductor Science and Technology, Vol. 6, pp. 265-268, 1993.
• M. KARPPINEN, A. FUKUOKA, J. WANG, S. TAKANO, M. WAKATA, T. IKEMACHI, H. YAMAUCHI. Valence Studies on Various Superconducting Bismuth and Lead Cuprates and Related Materials, Physica C , Vol. 208, pp. 130-136, 1993.
• M.Karppinen. Preparation and Chemical Characterization of High-T_c Oxide Superconductors and Related Cuprates, Annales Academiae Scientiarum Fennicae, Series A II. Chemica, Vol. 249, pp. 51, 1993.
• M. Karppinen, L. Niinisto, K. Ullakko. Europium-based High-temperature Superconductors Studied by X-ray Diffraction and ¹⁵¹Eu Mossbauer Spectroscopy, Phys. Rev. B, Vol. 46, pp. 8534-8541, 1992.
• S. TAKANO, M. WAKATA, J. WANG, M. KARPPINEN, H. YAMAUCHI. Control of the Formation of Secondary Phases in Pb-Substituted Bi-2212 Superconductors with Respect to Oxygen Partial Pressure , Proceedings of ISTEC-MRS International Workshop on Superconductivity , 1992.
• M. Karppinen, O. Antson, P. Baules, T. Karlemo, T. Katila, J. Linden, M. Lippmaa, L. Niinisto, C. Roucau, I. Tittonen, K. Ullakko. Characterization of the Europium Substituted Superconducting Bi₂Sr₂CaCu₂O_8+y Phase, Supercond. Sci. Technol., Vol. 5, pp. 476-481, 1992.
• M. Karppinen, L. Niinisto, M. Veber. Preparation of Superconducting YBa₂Cu₃O_7-y from Carbon-free Precursors, Acta Chem. Scand., Vol. 46, pp. 255-258, 1992.
• J. Holsa, M. Karppinen. Crystal Field Analysis of Eu³⁺ Doped Lanthanum Oxynitrate, LaONO₃:Eu³⁺, Eur. J. Solid State Inorg. Chem., Vol. 28, pp. 135-138, 1991.
• M. Karppinen, L. Niinisto. Determination of the Oxygen Content in the Superconducting YBa₂Cu₃O_7-y Phas, Supercond. Sci. Technol., Vol. 4, pp. 334-336, 1991.
• O. Antson, T. Karlemo, M. Karppinen, K. Ullakko. Neutron Powder Diffraction Study on Eu-substituted Bi₂Sr₂CaCu₂O_8+y High Temperature Superconductor, Physica C, Vol. 173, pp. 65-74, 1991.
• I. Tittonen, J. Hietaniemi, J. Huttunen, E. Ikonen, M. Karppinen, T. Katila, J. Linden, L. Niinisto. Studies of Hyperfine Interactions in RBa₂(Cu_1-x⁵⁷Fe_x)₃O_7-y High-T_cSuperconductors, Hyperfine Interact, Vol. 55, pp. 1399-1404, 1990.
• I. Tittonen, J. Hietaniemi, J. Huttunen, T. Karlemo, M. Karppinen, T. Katila, J. Linden, L. Niinisto, K. Ullakko. Preparative and Mossbauer Studies of Bi₂Sr₂Ca_n-1Cu_nO_y Compounds with n = 2 or 3, Hyperfine Interact, Vol. 55, pp. 1405-1410, 1990.
• I. Tittonen, J. Hietaniemi, J. Huttunen, J. Linden, T. Katila, T. Karlemo, M. Karppinen, L. Niinisto, K. Ullakko. Characterization of Superconducting Bi₂Sr₂Ca_n-1Cu_nO_4+2n Phases with ⁵⁷Fe Mossbauer Spectroscopy, Phys. Rev. B, Vol. 42, pp. 4212-4218, 1990.
• M. Karppinen, P. Kylakoski, L. Niinisto, C. Rodellas. Thermal Decomposition as a Preparative Route to Anhydrous Rare Earth Nitrates, J. Therm. Anal., Vol. 35, pp. 347-353, 1989.
• M. Karppinen, M. Leskela, L. Niinisto . Studies on Lanthanoid Sulfites. Part VIII. Thermogravimetric Study of Europium Sulfite Trihydrate , J. Therm. Anal. , Vol. 35, pp. 355-359, 1989.
• I. Tittonen, J. Hietaniemi, J. Huttunen, M. Karppinen, T. Katila, J. Linden, L. Niinisto, K. Ullakko. Growth of ⁵⁷Fe-doped YBa₂Cu₃O_7-y Single Crystals for Mossbauer and Susceptibility Measurements, Physica C, Vol. 162-164, pp. 1259-1260, 1989.

著書

• M. Karppinen, H. Yamauchi. Chemical design of copper-oxide superconductors: Homologous series and oxygen engineering, in Frontiers in Superconducting Materials, A.V. Narlikar (Ed), Springer Verlag, Berlin, pp. 255-294, 2005.
• M. Karppinen, H. Yamauchi. Chemistry of halfmetallic and related cation-ordered double perovskites, in Frontiers in Superconducting Materials, A.V. Narlikar (Ed), Springer Verlag, Berlin, pp. 153-184, 2005.
• V.P.S. Awana, M. Karppinen, H. Yamauchi. Magneto-Superconductivity in Rutheno-Cuprates RuSr₂GdCu₂O_8-d (Ru-1212) and RuSr₂(Gd_0.75Ce_0.25)₂Cu₂O_10-d (Ru-1222): A Critical Review, In: International Book Series: Studies of High Temperature Superconductors, A.V. Narlikar (Ed.), Nova Science Publishers, New York, In: International Book Series: Studies of High Temperature Superconductors, A.V. Narlikar (Ed.), Nova Science Publishers, New York, Vol. 46, pp. 77-98, 2003.
• M. カルピネン（翻訳：山内尚雄, 末松久幸）. セラミック工学ハンドブック［第2版］応用／第7編　電気・電子・磁性材料：第5章　5.2.2 溶液法, （社）日本セラミックス協会／技報堂出版, （社）日本セラミックス協会／技報堂出版, pp. 985-987, 2002.
• M. カルピネン, 山内尚雄. セラミック工学ハンドブック［第2版］応用／第7編　電気・電子・磁性材料：第5章　5.1.2 超伝導酸化物の種類と分類, （社）日本セラミックス協会／技報堂出版, （社）日本セラミックス協会／技報堂出版, pp. 977-980, 2002.
• T. Motohashi, M. Karppinen, H. Yamauchi. Sodium and Oxygen Nonstoichiometry, and Thermoelectric Properties of Na_xCoO_2+d, Oxide Thermoelectrics (Research Signpost, India), Oxide Thermoelectrics (Research Signpost, India), pp. 73-81, 2002.
• M. Karppinen, H. Yamauchi. Oxygen Engineering for Functional Oxide Materials, In: International Book Series: Studies of High Temperature Superconductors, Nova Science Publishers, New York, Nova Science Publishers, New York, pp. 109-143, 2001.
• H. Yamauchi, M. Karppinen, J. Linden. Chemical Control of Metal Valences and Magnetic Properties Various A- or B-Site Ordered Iron-oxide Double Perovskites, Proceedings of 8th International Conference on Ferrites, Kyoto, Japan, Proceedings of 8th International Conference on Ferrites, Kyoto, Japan, 2000.
• J. Linden, J. Nakamura, P. Karen, A. Kjekshus, M. Karppinen, H. Yamauchi. Observation of Mixed-valence State in the BaSm(Cu_1-xFe_x)₂O_5+δ, Advances in Superconductivity XII, T. Yamashita and K. Tanabe (Eds.), Springer, Tokyo, Advances in Superconductivity XII, T. Yamashita and K. Tanabe (Eds.), Springer, Tokyo, pp. 95-97, 2000.
• M. Karppinen . Materials Chemistry of Superconductive Copper Oxides, Elsevier Science, Oxford , Elsevier Science, Oxford , 2000.
• T. Nakane, K. Fujinami, M. Karppinen, H. Yamauchi. Magnetic-field Irreversibility and Hole Distribution in Cu(Ba_0.8Sr_0.2)₂(Yb_1-xCa_x)Cu₂O_6+z, Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo, Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo, pp. 427-430, 1999.
• H. Suematsu, M. Nagase, Y. Tomokiyo, M. Karppinen, H. Yamauchi. Application of Convergent-beam-electron-diffraction Technique to Determine Novel Cuprate Structures, Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo , Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo , pp. 389-392, 1999.
• T. Hosomi, H. Suematsu, H. Fjellvag, Y. Matsui, Y. Tomokiyo, M. Karppinen, H. Yamauchi. Investigation of an Unstable T_c = 126 K Phase and its Derivative Phase in the Ba-Ca-Cu-O System, Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo, Advances in Superconductivity XI, N. Koshizuka and S. Tajima (Eds.), Springer, Tokyo, pp. 367-370, 1999.
• K. Fujinami, T. Nakane, K. Peitola, R. Tellgren, M. Karppinen, H. Yamauchi. Hole Doping Mechanism and Structural Changes in Cu(Ba_0.8Sr_0.2)₂(Yb_1-xCa_x)Cu₂O_6+z, Advances in Superconductivity X, K. Osamura and I. Hirabayashi (Eds.), Springer, Tokyo, Advances in Superconductivity X, K. Osamura and I. Hirabayashi (Eds.), Springer, Tokyo, pp. 323-326, 1998.
• M. Karppinen, H. Yamauchi, K. Fujinami, T. Ito, H. Suematsu, H. Sakata, K. Matsuura. Synthesis and Characterization of Strongly Overdoped HgBa₂Ca₂Cu₃O_8+δ Samples, Advances in Superconductivity X, K. Osamura and I. Hirabayashi (Eds.), Springer, Tokyo, Advances in Superconductivity X, K. Osamura and I. Hirabayashi (Eds.), Springer, Tokyo, pp. 319-322, 1998.
• M. Karppinen, H. Yamauchi, L. Niinisto. Oxygen Stoichiometry and Copper Valency in Superconducting Cuprates Studied by Chemical Methods, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, pp. 371-376, 1997.
• H. Yamauchi, M. Karppinen. Hole Doping Routes and Confined Net Holes in Superconducting Cuprates, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, pp. 381-386, 1997.
• K. Isawa, Y. Yaegashi, M. Komatsu, M. Nagano, S. Sudo, M. Karppinen, H. Yamauchi. Synthesis and Electrical Conductivity of<RE>CuO_2+δ (<RE> = Y, La, Pr, Nd, Sm and Eu) Delafossite, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, Advances in Superconductivity IX, S. Nakajima and M. Murakami (Eds.), Springer-Verlag, pp. 423-426, 1997.
• M. Karppinen, H. Yamauchi, L. Niinisto. Studies on the Oxygen Stoichiometry and Copper Valency in Superconducting Cuprates by Means of Chemical Analysis, Advances in Superconductivity, R. Pinto, S.K. Malik, A.K. Grover and P. Ayyub (Eds.), New Age International, New Delhi, Advances in Superconductivity, R. Pinto, S.K. Malik, A.K. Grover and P. Ayyub (Eds.), New Age International, New Delhi, pp. 1-9, 1997.
• H. Yamauchi, M. Karppinen. Homologous Series of Layered Cuprates and Superconductivity, Advances in Superconductivity, R. Pinto, S.K. Malik, A.K. Grover and P. Ayyub (Eds.), New Age International, New Delhi , Advances in Superconductivity, R. Pinto, S.K. Malik, A.K. Grover and P. Ayyub (Eds.), New Age International, New Delhi , pp. 46-52, 1997.
• M. Karppinen, J. Linden, A. Fukuoka, L. Niinisto, H. Yamauchi. Synthesis and Chemical Characterization of Pb₂Ba₂EuCu₃O_z Samples, Advances in Superconductivity VII, H. Yamafuji and T. Morishita (Eds.), Springer-Verlag, Advances in Superconductivity VII, H. Yamafuji and T. Morishita (Eds.), Springer-Verlag, pp. 273-276, 1995.
• M.Wakata, S. Takano, J. Wang, M. Karppinen, H. Yamauchi. Oxygen-content Dependence of the Flux Pinning in Pb-substituted Bi-2212 Superconductors, Advances in Superconductivity V, Y. Bando and H. Yamauchi (Eds.), Springer-Verlag, Advances in Superconductivity V, Y. Bando and H. Yamauchi (Eds.), Springer-Verlag, pp. 423-426, 1993.
• A. Fukuoka, M. Karppinen, M. Ito, K. Hamada, H. Yamauchi. Determination of Average Valences of Copper and Thallium Separately in the Superconducting Thallium Cuprates, Advances in Superconductivity V, Y. Bando and H. Yamauchi (Eds.), Springer-Verlag, Advances in Superconductivity V, Y. Bando and H. Yamauchi (Eds.), Springer-Verlag, pp. 283-286, 1993.
• E. Ikonen, J. Hietaniemi, K. Harkonen, M. Karppinen, T. Katila, J. Linden, L. Niinisto, H. Sipola, I. Tittonen, K. Ullakko. Susceptibility and Mossbauer Studies of Orthorhombic and Tetragonal, High-Tc Superconductors, Weber H.W. (Ed.), Plenum Publishing Corporation, High-Tc Superconductors, Weber H.W. (Ed.), Plenum Publishing Corporation, pp. 209-215, 1988.

国際会議発表 (査読有り)

• T. Motohashi, T. Ono, Y. Katsumata, R. Kanno, M. Karppinen, H. Yamauchi. Electrochemical synthesis and properties of CoO2, the x = 0 phase of the AxCoO2 systems (A = Li, Na), Journal of Applied Physics, Vol. 103, pp. 07C902-1-3, May 2008.
• T. Motohashi, S. Kadota, H. Fjellvåg, M. Karppinen, H. Yamauchi. Uncommon oxygen intake/release capability of layered cobalt oxides, REBaCo4O7+d: novel oxygen-storage materials, Materials Science and Engineering, Vol. B148, pp. 196-198, 2008.
• J. Lindén, J. Lindén, KARPPINEN MAARIT, Grigoraviciute Inga, 山内 尚雄. Measurement of local magnetic fields in the CuO2 planes of CuBa2YCu2O7- superconductors, Physical Review Letters, Vol. 98, pp. 67001-1-4, 2007.
• T. Nagai, Y. Baba, KARPPINEN MAARIT, T. Asaka, S. Alam, 山内 尚雄, 山崎 陽太郎, K. Kimoto, Y. Matsui. Crystal structure analysis of Co-based layered cuprates CoSr2(Y1-xCax)Cu2O7+δ by transmission electron microscopy techniques, Physica C, Vol. in press, 2007.
• M. Lehtimäki, A. Hirasa, M. Matvejeff, 山内 尚雄, KARPPINEN MAARIT. Water-containing derivative phases of the Srn+1FenO3n+1 series, Journal of Solid State Chemistry, Vol. in press, 2007.
• G. Peleckis, G. Peleckis, KARPPINEN MAARIT, 山内 尚雄. Isovalent substitution effects in the Na layer of -Na0.75CoO2 thermoelectric oxide, Physica C, Vol. 460-462, pp. 485-486, 2007.
• Y.H. Huang, KARPPINEN MAARIT, N. Imamura, 山内 尚雄, J.B. Goodenough. Structural transformation and magnetic competition in Yb(Mn1-xFex)O3, Physical Review B, Vol. 76, pp. 174405-1-5, 2007.
• N. Imamura, KARPPINEN MAARIT, 山内 尚雄. Magnetic dilution in the frustrated ferromagnetic pyrochlore system, (Dy1-xLux)2Mn2O7, Solid State Communications, Vol. 144, pp. 98-102, 2007.
• L. Karvonen, S. Räsänen, 山内 尚雄, KARPPINEN MAARIT. Chemical Oxidation of SrCoO3-d, Chemistry Letters, Vol. 36, pp. 1176-1177, 2007.
• E.S. Otabe, I. Kohno, M. Kiuchi, T. Matsushita, 野村 朋哉, 本橋 輝樹, KARPPINEN MAARIT, 山内 尚雄, S. Okayasu. Condensation energy density of superconducting Bi-2223 single crystals, Advances in Cryogenic Engineering: Transactions of the International Cryogenic Materials Conference 2005 - ICMC2005, Vol. 52, pp. 805-812, Dec. 2006.
• T. Akao, T. Motohashi, M. Karppinen, H. Yamauchi, M. Hayakawa. Redox behavior during the transformation in zirconia with low yttria content, Materials Science and Engineering A, Vol. 438-440, pp. 387-390, Dec. 2006.
• I. Kohno, M. Kiuchi, E.S. Otabe, T. Matsushita, T. Nomura, T. Motohashi, M. Karppinen, H. Yamauchi, S. Okayasu. Pinning characteristics at high fields in superconducting Bi-2223 single crystals, Physica C, Vol. 445-448, pp. 137-140, 2006.

国際会議発表 (査読なし・不明)

• T. Motohashi, Y. Katsumata, T. Ono, R. Kanno, M. Karppinen, H. Yamauchi. Electrochemical synthesis and properties of CoO2, the x = 0 phase of the AxCoO2 systems (A = Li, Na), 52nd Annual Conference on Magnetism and Magnetic Materials, Abstracts: 52nd Annual Conference on Magnetism and Magnetic Materials, pp. CD-09, Nov. 2007.

国内会議発表 (査読なし・不明)

• 門田祥悟, 本橋輝樹, M. Karppinen, 山内尚雄. 層状コバルト酸化物REBaCo4O7の酸素吸収・放出特性と関連物性, 日本物理学会 第62回年次大会, （社）日本物理学会, pp. 22aWG-8, Sept. 2007.
• 田中良明, 本橋輝樹, M. Karppinen, 山内尚雄. 電子ドープ型層状銅酸化物系 (Nd1-xCex)2CuO4+dの精密な状態図, 日本物理学会 第62回年次大会, （社）日本物理学会, pp. 23pXA-11, Sept. 2007.
• 本橋輝樹, 小野隆志, 勝又義徳, 菅野了次, M. Karppinen, 山内尚雄. CoO2及びLixCoO2の電気化学合成と物性, 日本物理学会 第62回年次大会, （社）日本物理学会, pp. 23pWH-13, Sept. 2007.
• 今村直貴, M. Karppinen, H. Fjellvåg, 本橋輝樹, 山内尚雄. 大きく歪んだペロブスカイト構造をもつLuMnO3におけるキャリア－・ドーピング, 応用物理学会 2007年春季 第54回応用物理学関係連合講演会, 応用物理学会, pp. 27a-P2-6, Mar. 2007.
• 門田祥悟, 本橋輝樹, M. Karppinen, 山内尚雄. 新規酸素貯蔵材料REBaCo4O7+d (RE = Dy, Y, Yb, Lu), 応用物理学会 2007年春季 第54回応用物理学関係連合講演会, 応用物理学会, pp. 30a-K-9, Mar. 2007.
• 松田泰明, 本橋輝樹, 山崎陽太郎, M. Karppinen, 山内尚雄. ダブルペロブスカイト型酸化物Sr2MgMoO6-dの燃料電池アノード材料としての化学的安定性, 応用物理学会 2007年春季 第54回応用物理学関係連合講演会, 応用物理学会, pp. 486(30a-K-10), Mar. 2007.
• 田中良明, 本橋輝樹, M. Karppinen, 山内尚雄. 電子ドープ型層状銅酸化物(Nd1-xCex)2CuO4+dにおける超伝導発現条件, 応用物理学会 2007年春季 第54回応用物理学関係連合講演会, 応用物理学会, pp. 30a-L-8, Mar. 2007.
• 野村朋哉, 本橋輝樹, M. Karppinen, 山内尚雄. 酸素量を制御した(Bi,Pb)-2223相単結晶の臨界電流特性（Ⅰ）：単結晶育成・配向試料の作製・臨界電流特性評価, 応用物理学会 2007年春季 第54回応用物理学関係連合講演会, 応用物理学会, pp. 29a-L-4, Mar. 2007.

特許など

• 山内尚雄, KARPPINENMAARIT, FJELLVAG, Helmer, 本橋輝樹. 酸素過剰型金属酸化物及び酸素貯蔵又は酸素選択膜用セラミックスと該金属酸化物を用いる方法及び装置. 特許. 公開. 国立大学法人東京工業大学. 2006/06/29. 特願2007-524099. 2007/01/11. 特再表2007-004684. 2007.
• 山内尚雄, KARPPINENMAARIT, 酒井　佳, 長井　拓郎, 浅香　透, 松井　良夫. 熱電変換層状コバルト酸化物とその合成方法. 特許. 公開. 国立大学法人東京工業大学, 独立行政法人 物質・材料研究機構. 2005/02/14. 特願2005-036762. 2006/08/24. 特開2006-222397. 2006.

学位論文

• Preparation and Chemical Characterization of High T_c Oxide Superconductors and Related Cuprates,  本文,  Doctor of Technology,  Helsinki University of Technology,  1993/--/--, 
• Preparation and Stoichiometry of Oxide Superconductors,  本文,  Ph.D.,  Helsinki University of Technology,  1990/--/--, 
• ,  Master of Science,  Helsinki University of Technology,  1987/--/--, 

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