論文

• A. Harada, T. Taniyama, Y. Takeuchi, T. Sato, T. Kyomen, M. Itoh. Ferromagnetism at the surface of a LaCoO₃ single crystal observed using scanning SQUID microscopy, Phys. Rev. B, Vol. 75, No. 18, pp. 184426-1-5, Oct. 2007.
• Y. Kamihara, Y. Takeshita, M. Matoba, T. Kyomen, M. Itoh. Giant magnetoresistance of spinel-type Fe_1-xMn_xCr₂S₄, Nippon Oyo Jiki Gakkaishi , Vol. 28, No. 3, pp. 347-350, 2004.
• Y. Kamihara, M. Matoba, T. Kyomen, M. Itoh. Magnetoresistance in spinel-type Mg_xCu_1-xCr₂S₄, Solid State Communication, Vol. 132, pp. 247-251, 2004.
• Mitsuru Itoh, Takaaki Azuma, Toru Kyomen, Katsunori Iio, Kiyoko Yamanaka, Ruiping Wang. Evaluation of the multidomain state in SrTi¹⁸O₃ by optical birefringence, Journal of Physical Society of Japan, Vol. 73, No. 5, pp. 1377-1378, 2004.
• Zhang Zhen He, Toru Kyomen, Mitsuru Itoh. Spin-Glass Behavior in the Ordered Ribbon Borate Cu₂CoB₂O₆, Physical Review B, Vol. 70, No. 13, pp. 134431/1-134431/5, 2004.
• T. Azuma, K. Iio, K. Yamanaka, T. Kyomen, R. Wang, M. Itoh. Birefringence study of ferroelectric ordering in oxygen isotope exchanged system SrTi(¹⁶O_1-x¹⁸O_x)₃, Ferroelectrics, Vol. 304, pp. 77-82, 2004.
• Yoshiaki Uesu, Pyuhei Nakai, Jean-Michel Kiat, Carole Menoret, Mitsuru Itoh, Toru Kyomen. Polar Order in Quantum Paraelectric SrTi¹⁶O₃ and SrTi¹⁸O₃ at Low Temperature, Journal of Physical Society of Japan, Vol. 73, No. 5, pp. 1139-1142, 2004.
• Zhang Zhen He, Toru Kyomen, Mitsuru Itoh. BaCu₂V₂O₈: Quasi-one-dimensional alternating chain compound with a large spin gap, Physical Review B, Vol. 69, No. 22, pp. 220407/1-220407/4, 2004.
• H. Okabe, M. Matoba, T. Kyomen, M. Itoh. First-principles study of electronic and magnetic structure in layered cobaltite Na_0.75CoO₂, Journal of Applied Physics, Vol. 95, No. 11, Pt. 2, pp. 6831-6833, 2004.
• Toru Kyomen, Ryutaro Yamazaki, Mitsuru Itoh. Correlation between Magnetic Properties and Mn/Co Atomic Order in LaMn_0.5Co_0.5O_3+d 2. Magnetic and Calorimetric Properties, Chemistry of Materials, Vol. 16, No. 1, pp. 179-184, 2004.
• Norihiko Sakamoto, Toru Kyomen, Shingo Tsubouchi, Mitsuru Itoh. Proportional relation between magnetoresistance and entropy suppression due to magnetic field in metallic ferromagnets, Physical Review B, Vol. 69, No. 9, pp. 092401/1-092401/4, 2004.
• Shingo Tsubouchi, Toru Kyomen, Mitsuru Itoh. Electric, magnetic, and calorimetric properties and phase diagram of Pr_1-xCa_xCoO₃ (0 < x < 0.55), Physical Review B, Vol. 69, No. 14, pp. 144406/1-144406/7, 2004.
• Toru Kyomen, Ryutaro Yamazaki, Mitsuru Itoh. Magnetic properties of LaSrCo_0.5Ni_0.5O₄, Physica B, Vol. 329-333, pp. 749-750, 2003.
• Mitsuru Itoh, Ruiping Wang, Miho Narahara, Toru Kyomen. Dielectric Properties of SrTi¹⁸O₃, Ferroelectrics, Vol. 285, pp. 3-17, 2003.
• Toru Kyomen, Ryutaro Yamazaki, Mitsuru Itoh. Valence and spin state of Co and Ni ions and their relation to metallicity and ferromagnetism in LaCo_0.5Ni_0.5O₃, Physical Review B, Vol. 68, No. 10, pp. 104416/1-104416/6, 2003.
• 壺内信吾, 京免徹, 伊藤満. ペロブスカイト型コバルト酸化物におけるスピンクロスオーバー現象, 熱測定, Vol. 30, No. 4, pp. 180-188, 2003.
• Toru Kyomen, Ryutaro Yamazaki, Mitsuru Itoh. Correlation between Magnetic Properties and Mn/Co Atomic Order in LaMn_0.5Co_0.5O_3+d 1. Second-order Nature in Mn/Co Atomic Ordering and Valence State, Chemistry of Materials, Vol. 15, No. 25, pp. 4798-4803, 2003.
• H. Okabe, M. Matoba, T. Kyomen, M. Itoh. Magnetic property and electronic structure of itinerant Pd_xCo_yO₂ magnets, Journal of Applied Physics, Vol. 93, No. 10, pp. 7258-7260, 2003.
• Mitsuru Itoh, Wolfgang Kleemann, Jan Dec, Ruiping Wang, Miho Narahara, Toru Kyomen. Phase transition and nonlinear susceptibility in SrTi¹⁸O₃, Trans. Mater. Soc. Japan, Vol. 28, pp. 105-107, 2003.
• Shingo Tsubouchi, Toru Kyomen, Mitsuru Itoh. Calorimetric study of La_1-xSr_xCoO_3-d (0<x<0.5): Evidence for long-range ferromagnetic ordering for x>=0.3, Physical Review B, Vol. 67, No. 9, pp. 094437/1-094437/5, 2003.
• Toru Kyomen, Yoshinori Asaka, Mitsuru Itoh. Negative cooperative effect on the spin-state excitation in LaCoO₃, Physical Review B, Vol. 67, No. 14, pp. 144424/1- 144424/6, 2003.
• Y. Kamihara, M. Matoba, T. Kyomen, M. Itoh. Properties of novel layered manganese oxysulfide Sr₂CuMnO₃S, Nippon Oyo Jiki Gakkaishi, Vol. 26, No. 4, pp. 372-375, 2002.
• Shingo Tsubouchi, Toru Kyomen, Mitsuru Itoh, Parthasarthy Ganguly, Masaharu Oguni, Yutaka Shimojo, Yukio Morii, Yoshinobu Ishii. Simultaneous metal-insulator and spin-state transitions in Pr_0.5Ca_0.5CoO₃, Physical Review B, Vol. 66, No. 5, pp. 052418/1-052418/4, 2002.
• Shunsuke Kunugi, Toru Kyomen, Yoshiyuki Inaguma, Mitsuru Itoh. Investigation of isotope effect of lithium ion conductivity in (La, Li)TiO₃ single crystal, Electrochemical and Solid-State Letters, Vol. 5, No. 6, pp. A131-A134, 2002.
• Mitsuru Itoh, Ruiping Wang, Miho Narahara, Toru Kyomen. Nonlinear response of dielectric properties of nano-domains in SrTi¹⁸O₃, Trans. Mater. Soc. Japan, Vol. 27, pp. 227-230, 2002.
• T. Kyomen, M. Itoh. Calorimetric and structural studies of La1-xYxAlO3 and Y_1-xLu_xAlO₃ crystals, Journal of Thermal Analysis and Calorimetry, Vol. 69, No. 3, pp. 813-819, 2002.
• Y. Kamihara, M. Matoba, T. Kyomen, M. Itoh. Magnetic and electronic nature of layered manganese oxysulfide Sr₂CuMnO₃S, Journal of Applied Physics, Vol. 91, No. 10, pp. 8864-8866, 2002.
• Toru Kyomen, Minoru Morita, Mitsuru Itoh, Kay Kohn, Naoki Kamegashira. Calorimetric study of ferroelectromagnetic crystals, YMnO₃, ErMnO₃, and LuMnO₃, Ferroelectrics, Vol. 264, No. 1-4, 223-228, 2001.
• 京免徹, 小國正晴, 伊藤満. 層状ペロブスカイト型酸化物における過剰酸素配列の秩序化と動的性質, 熱測定, Vol. 27, No. 2, pp. 67-76, 2000.
• Toru Kyomen, Masahari Oguni, Mitsuru Itoh, Kenzo Kitayama. Order-disorder phase transition of excess oxygen atoms and their appearance as eutectoid and peritectoid reactions in La₂NiO_4+d(d=0.047-0.116) crystals, Physical Review B, Vol. 60, No. 1, pp. 815-821, 1999.
• Toru Kyomen, Masaharu Oguni, Jian Ding Yu, Mitsuru Itoh. Calorimetric study of electrochemically oxidized crystal La₂CuO_4.05: emergence of stabilization of phenomenon, phase transition, and glass transition due to fleezing-in of the rearrangement of excess oxygen atoms, Physical Review B, Vol. 60, No. 9, pp. 6821-6826, 1999.
• Toru Kyomen, Masaharu Oguni, Mitsuru Itoh, Kenzo Kitayama. Phase diagram and effect of excess oxygen atoms on the spin and charge orderings in La₂NiO_4+d crystal, Physical Review B, Vol. 60, No. 21, pp. 14841-14846, 1999.
• Toru Kyomen. Construction of an adiabatic calorimeter in the temperature range between 13 and 505 K, and thermodynamic study of 1-chloroadamantane, Journal of Physics and Chemistry of Solids, Vol. 59, pp. 667, 1998.
• Toru Kyomen, Hiroyasu Tamura, Masaharu Oguni, Mitsuru Itoh, Kenzo Kitayama. Structural phase transitions of a successive type and the two-dimensional nature of the antiferromagnetic ordering in La₂NiO₄ single crystals, Journal of Physics: Condensed Matter, Vol. 9, pp. 1841, 1997.
• Toru Kyomen. Effect of oxygen content on the anomalies at successive phase transitions of La₂CuO_4+d single crystal below 320 K, Physical Review B, Vol. 54, No. 10, pp. 7455, 1996.
• Toru Kyomen, Masaharu Oguni, Kenzo Kitayama, Mitsuru Itoh. Phase separation, oxygen composition, and a glass transition due to freezing-in of the oxygen rearrangement in La₂NiO_4.094 single crystals, Physical Review B, Vol. 52, No. 5, pp. 3177-3183, 1995.
• Toru Kyomen, Masaharu Oguni, Mitsuru Itoh, Jian Ding Yu. Emergence of two superconducting phases (33 K and 40 K) and their relation to structural phase transitions in crystalline La₂CuO_4.011, Physical Review B, Vol. 51, No. 5, pp. 3181-3185, 1995.
• Toru Kyomen. Calorimetric and resistometric studies of La₂CuO_4+d single crystals: displacive character of phase transitions in 190-310 K,, Solid State Communication, Vol. 90, pp. 787, 1994.

学位論文

• Ordering and Freezing-in Processes of Excess Oxygen Atoms in Nonstoichiometric Crystals La_n+1Ni_nO_3n+1+δand La₂CuO_4+δ,  Thesis,  Doctor of Science,  Tokyo Institute of Technology,  1999/03/26,   

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