Magnetic field evolution of a novel phase transition in CeOs4Sb12: 121Sb NMR study
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- Yogi Mamoru
- Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus
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- Niki Haruo
- Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus
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- Yashima Mitsuharu
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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- Mukuda Hidekazu
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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- Kitaoka Yoshio
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University
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- Sugawara Hitoshi
- Faculty of Integrated Arts and Sciences, The University of Tokushima
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- Sato Hideyuki
- Department of Physics, Tokyo Metropolitan University
書誌事項
- タイトル別名
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- Magnetic Field Evolution of a Novel Phase Transition in CeOs<SUB>4</SUB>Sb<SUB>12</SUB>: <SUP>121</SUP>Sb NMR Study
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説明
We report on the evolution of a novel phase transition under magnetic field (H) in the filled skutterudite compound CeOs4Sb12 probed by 121Sb NMR. Measurements of nuclear spin–lattice relaxation rate 121(1⁄T1) for the oriented powder with H||[100] have revealed that antiferromagnetic (AFM) spin fluctuations due to the proximity of a quantum critical point at H=0 are markedly suppressed by the application of H, which is consistent with the result indicating that the AFM order at TN=0.9 K with a very small moment of 0.07μB collapses, exceeding H=1 T. As H increases further, a large reduction in 1⁄T1T was observed below the temperature T0, which varies as a dome against H with a maximum of 1.8 K at H∼6 T. The values of T1T=const. well below T0 decrease with increasing H, indicating that the residual density of states depends on H. It is suggested that the field-induced novel transition is associated with the freezing of multipole degree of freedom.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (5), 053703-053703, 2009
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679173312000
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- NII論文ID
- 130005437464
- 10025960083
- 210000107789
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 10225034
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可