Transport and Magnetic Properties of a Low-Density Carrier System SmBiPt
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概要
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We present the results of electrical resistivity ρ, Hall coefficient RH, thermoelectric power S, specific heat C and magnetic susceptibility χ on SmBiPt with the MgAgAs-type structure. ρ(T) and S(T) exhibit a broad maximum of 1.7 mΩcm at 80 K and 60 µV/K at 126 K, respectively. These facts and the change of RH from negative to positive on cooling through 200 K indicate the semimetallic nature of SmBiPt. At around 7 K, ρ(T) and S(T) show a shallow dip and a small peak, respectively. The antiferromagnetic order at TN= 2.2 K is manifested as a sudden drop in ρ and a peak in both C and χ. The magnetic entropy at TN is 0.6Rln4 and reaches a plateau of Rln4 at 18 K, indicating the Γ8 quartet ground state of Sm3+ in this cubic compound. The results of χ(T) and magnetization curve can be explained by considering the mixing of higher multiplet levels of J=7/2 and 9/2 into the ground multiplet of J=5/2.
- Physical Society of Japanの論文
- 2001-12-15
著者
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UMEO Kazunori
Department of Quamtam Matter, ADSM, Hiroshima University
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Kim Moo-sung
Department Of Quantum Matter Adsm Hiroshima University
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Iga Fumitoshi
Department Of Physics Tohoku University
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Takabatake Toshiro
Department Of Quantum Matter Adsm Hiroshima University
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Goto Tsuneaki
Institute For Solid State Physics The University Of Tokyo
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Mitamura Hiroyuki
Institute For Solid State Physics (issp) University Of Tokyo
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Suemitsu Toshiaki
Department Of Quantum Matter Adsm Hiroshima University
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Bando Yoshio
Department Of Anatomy 1 Asahikawa Medical College
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Sasakawa Tetsuya
Department Of Quamtam Matter Adsm Hiroshima University
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Goto Tsuneaki
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581
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Mitamura Hiroyuki
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581
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Takabatake Toshiro
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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Kim Moo-Sung
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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KIM Moo-Sung
Department of Physics, University of Michigan
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Suemitsu Toshiaki
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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Iga Fumitoshi
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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Umeo Kazunori
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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Sasakawa Tetsuya
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8526
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Bando Yoshio
Department of Electrical Engineering, Kure National College of Technology, Kure 737-8530
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