Temperature and Magnetic Field Dependent Yb Valence in YbRh
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概要
- 論文の詳細を見る
The temperature and magnetic field dependences of Yb valence were observed in the heavy fermion compound YbRh<inf>2</inf>Si<inf>2</inf>by X-ray absorption spectroscopy. The measurements revealed that the Yb valence decreases with decreasing temperature in the range from 200 to 2 K and increases with increasing magnetic field in the range from 0 to 33 T without showing an abrupt change in the Yb valence. The Yb valence is in the range from 2.92 to 2.96 depending on temperature and magnetic field. With respect to the valence being 2.92 at 0 T and 2.93 at 33 T in 2 K, YbRh<inf>2</inf>Si<inf>2</inf>is a valence fluctuation compound and does not reach the integer trivalent state at high magnetic field. These results endorse the conventional knowledge that the valence of Yb is very close to the integer value of 3+, decreases with decreasing temperature, and becomes closer to 3+ with increasing magnetic field.
- 2013-12-15
著者
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Tsutsui Satoshi
Japan Synchrotron Radiation Res. Inst. Hyogo Jpn
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MIZUMAKI Masaichiro
Japan Synchrotron Radiation Research Institute
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Kindo Koichi
Institute For Solid State Physics The University Of Tokyo
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Ebihara Takao
Department Of Physics Faculty Of Science Shizuoka University
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Michimura Shinji
Department Of Quantum Matter Adsm Hiroshima University
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Kawamura Naomi
Japan Synchrotron Radiation Research Institute
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Matsuda Yasuhiro
Institute For Materials Chemistry And Engineering Kyushu University
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Kondo Akihiro
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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INAMI Toshiya
Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan
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Mizumaki Masaichiro
Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan
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NAKAMURA Toshiyuki
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Nakai Hirohito
Department of Physics, Shizuoka University, Shizuoka 422-8529, Japan
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Michimura Shinji
Department of Physics, Saitama University, Saitama 338-8570, Japan
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KONDO Akihiro
Institute for Solid State Physics, The University of Tokyo
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