Elastic constant in magnetic fields and singlet-triplet state of heavy fermion superconductor PrOS4Sb12
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概要
- 論文の詳細を見る
We have made ultrasonic measurements on a filled skutterudite PrOs_4Sb_<12> showing a heavy fermion superconductivity at T_C=1.85 K. The softening of the elastic constant with decreasing temperature has been found above T_C. The (C_<11>-C_<12>)/2 in applying magnetic fields along the [110] axis at 1.0 K exhibits a minimum around 8T, which is well accounted for by the one-ion quadrupolar susceptibility reflecting the level crossing of one of an excited Г^<(2)>_4 triplet to a ground state Г_1 singlet. The softening of (C_<11>-C_<12>)/2 proportional to reciprocal temperature just above T_C may be dominated by the tunneling of an off-center Pr-ion in an Sb-icosahedron cage.
- 社団法人日本物理学会の論文
- 2005-01-15
著者
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柳澤 達也
北大創成
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Sakai K
Graduate School Of Pharmaceutical Sciences Kyushu University
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Yamaguchi T
Graduate School Of Agricultural Science Tohoku University
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Yanagisawa T
Graduate School Of Science And Technology Niigata University
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Goto Terutaka
Graduate School Of Science And Technology Niigata University
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Sato H
Department Of Analytical Chemistry Faculty Of Engineering Yokohama National University
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Sugawara H
Faculty Of Engineering Iwate University
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Onuki Kei
Graduate School Of Science And Technology Niigata University
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Nemoto Yuichi
Graduate School Of Science And Technology Niigata University
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YANAGISAWA Tatsuya
Graduate School of Science and Technology, Niigata University:Institute for Pure and Applied Physical Sciences, University of California at San Diego
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Akatsu M
Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology
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