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M. Isobe

礒部 正彦 ( ISOBE Masahiko )

技術専門職員 ・ 理学博士

東京大学 物性研究所 物質設計評価施設
〒277-8581 千葉県柏市柏の葉  5−1−5

電話&Fax: 04-7136-3499
e-mail: isobe [at] issp.u-tokyo.ac.jp


遷移金属酸化物における強相関電子系物質の探索と物性開拓

合成した代表的な物質

バナジウム酸化物

チタン酸化物

クロム酸化物

代表的な論文
バナジウム酸化物

"Magnetic susceptibility of quasi-one-dimensional compound α’-NaV2O5- Possible spin-Peierls compound with high critical temperature of 34K-", M. Isobe and Y. Ueda, J Phys Soc Jpn 65 (1996) 1178-1181.
"Crystal growth of new spin-Peierls compound α’-NaV2O5.", M. Isobe, C. Kagami and Y. Ueda, J Crystal Growth 181 (1997) 314-317.
"Effect of Na-deficiency on the spin-Peierls transition in α’-NaV2O5", M. Isobe and Y. Ueda, J Alloys Compds 262 (1997) 180-184.
"Observation of a spin gap in MgV2O5 from high field magnetization measurements", M. Isobe, Y. Ueda, K. Takizawa and T. Goto, J Phys Soc Jpn 67 (1998) 755-758.
"Crystal growth and magnetic properties of γ-LixV2O5 (0.90 <= x <= 100)", M. Isobe and Y. Ueda, Mater Res Bull 34 (1999) 1719-1728.
"Crystal structure and magnetic properties of Na9V14O35: Sodium-vanadium bronze η-NaxV2O5", M. Isobe, Y. Ueda, Y. Oka and T. Yao, J Solid State Chem 145 (1999) 361-365.
"Physical properties of vanadium oxide bronzes β-A0.33V2O5 (A = Ca and Sr)", M. Isobe and Y. Ueda, Mol Cryst Liq Cryst 341 (2000) 1075-1080.
"Observation of Metal-Insulator Transition in Hollandite Vanadate, K2V8O16", M. Isobe, S. Koishi, N. Kouno, J. Yamaura, T. Yamauchi,H. Ueda, H. Goto, T. Yagi and Y. Ueda, J Phys Soc Jpn 75 (2006) 073801
"Direct fabrication of metavanadate phosphor films on organic substrates for white-light-emitting devices", T. Nakajima, M. Isobe, T. Tsuchiya, Y. Ueda and T. Kumagai, Nat. Mater. 7 (2008) 735-740.
"Dimerization and Charge Order in Hollandite K2V8O16", A. C. Komarek, M. Isobe, J. Hemberger, D. Meier, T. Lorenz, D. Trots, A. Cervellino, M. T. Fernandez-Diaz, Y. Ueda, and M. Braden, Phys. Rev. Lett. 107 (2011) 027201-1-4.

チタン酸化物

"Novel phase transition in spin-1/2 linear chain systems: NaTiSi2O6 and LiTiSi2O6", M. Isobe, E. Ninomiya, A. N. Vasil'ev and Y. Ueda, J Phys Soc Jpn 71 (2002) 1423-1426.
"Observation of phase transition from metal to spin-singlet insulator in MgTi2O4 with S=1/2 pyrochlore lattice", M. Isobe and Y. Ueda, J Phys Soc Jpn 71 (2002) 1848-1851.
"Observation of lattice dimerization in spin-singlet low temperature phase of NaTiSi2O6", E. Ninomiya, M. Isobe, Y. Ueda, M. Nishi, K. Ohoyama, H. Sawa and T. Ohama, Physica B 329 (2003) 884-885.
"Synthesis, structure and physical properties of spinel solid solutions Mg2TiO4-MgTi2O4", M. Isobe and Y. Ueda, J Alloys Compds 383 (2004) 85-88.

クロム酸化物

"CaCrO3: An Anomalous Antiferromagnetic Metallic Oxide", A. C. Komarek, S. V. Streltsov, M. Isobe, T. Moller, M. Hoelzel, A. Senyshyn, D. Trots, M. T. Fernandez-Diaz, T. Hansen, H. Gotou, T. Yagi, Y. Ueda, V. I. Anisimov, M. Grueninger, D. I. Khomskii, M. Braden, Phys. Rev. Lett. 101 (2008) 167204-1-4.
"Discovery of ferromagnetic-half-metal-to-insulator transition in K2Cr8O16", K. Hasegawa, M. Isobe, T. Yamauchi, H. Ueda, J. Yamaura, H. Gotou, T. Yagi, H. Sato and Y. Ueda, Phys. Rev. Lett. 103 (2009)146403-1-4.
"Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O16", T. Toriyama, A. Nakao, Y. Yamaki, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe, Y. Ueda, A.V. Ushakov, D. I. Khomskii, S.V. Streltsov, T. Konishi, and Y. Ohta, Phys. Rev. Lett. 107 (2011) 266402-1-5.

 
論文リスト: 2003-2012, 1994-2002

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This page updated on January 10, 2013