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神戸 高志*; 深田 幸正*; 狩野 旬*; 永田 知子*; 岡崎 宏之*; 横谷 尚睦*; 脇本 秀一; 加倉井 和久; 池田 直*
Physical Review Letters, 110(11), p.117602_1 - 117602_5, 2013/03
被引用回数:25 パーセンタイル:75.25(Physics, Multidisciplinary)The magnetocapacitance effect was investigated using impedance spectroscopy on single crystals of LuFeO. The intrinsic impedance response could be separated from the interfacial response and showed a clear hysteresis loop below 240 under the magnetic field. The neutron diffraction experiment under the magnetic field proves the origin of the dielectric property related to the motion of the nanosized ferromagnetic domain boundary. These results imply that the modification of the microscopic domain structure is responsible for the magnetoelectric effect in LuFeO.
吉田 力矢*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Malaeb, W.*; Shin, S.*; 村岡 祐治*; 横谷 尚睦*
Physical Review B, 85(24), p.241102_1 - 241102_4, 2012/06
被引用回数:18 パーセンタイル:59.41(Materials Science, Multidisciplinary)The spectral functions of URuSi in the hidden-order state are studied by means of ultrahigh-resolution angle-resolved photoemission spectroscopy. High signal-to-noise ratio data uncover the existence of two anomalous fine structures. The structures can be explained by neither ordinary bands nor the development of a hybridization of two states. As a possible origin, we suggest the existence of electron-mode coupling in the ordered state.
吉田 力矢*; 中村 祥明*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Shin, S.*; 平井 正明*; 村岡 祐治*; et al.
Journal of Physics; Conference Series, 273, p.012021_1 - 012021_4, 2011/02
被引用回数:1 パーセンタイル:33.9(Physics, Condensed Matter)Electronic structures of U(RuRh)Si is studied employing ultrahigh-resolution laser angle-resolved photoemission spectroscopy. A hole-like dispersive feature, which presumably has Rh -band character, was observed.However, although a heavy quasiparticle band appears in the hidden-order state of URuSi ( = 0), it was not observed for = 0.03 over the temperature range studied.
吉田 力矢*; 中村 祥明*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Shin, S.*; 平井 正明*; 村岡 祐治*; et al.
Physical Review B, 82(20), p.205108_1 - 205108_6, 2010/11
被引用回数:62 パーセンタイル:88.1(Materials Science, Multidisciplinary)The detail of electronic structures near the Fermi level in URuSi has been investigated employing state-of-art laser angle-resolved photoemission spectroscopy. The observation of a narrow dispersive band near the Fermi level in the ordered state as well as its absence in RH-substituted sample strongly suggest that the emergence of the narrow band is a clear signature of the hidden-order transition.