Novel Phase Transition Probed by Sound Velocity in Quasi-One-Dimensional Ising-Like Antiferromagnet BaCo2V2O8
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概要
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We have performed magnetostriction and ultrasound measurements on the quasi-one-dimensional S = 1/2 Ising-like antiferromagnet BaCo2V2O8 in high magnetic fields of up to 51 T. The magnetostriction shows lattice shrinking along the c-axis, and we interpret it as the lattice distortion caused by exchange striction and Van-Vleck paramagnetism. It is clarified that the field dependence of sound velocity is correlated to the magnetostriction. We observed a pronounced softening in the sound velocity of the longitudinal-acoustic c_{33} mode and found a novel phase transition.
- 2011-03-15
著者
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Okunishi Kouichi
Department Of Physics Faculty Of Science Niigata Univeristy
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Itoh Mitsuru
Materials & Structures Laboratory Tit
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Taniyama Tomoyasu
Materials And Structures Laboratory Tokyo Institute Of Technology
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Yoshii Shunsuke
Institute For Materials Research Tohoku University
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Hagiwara Masayuki
Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University
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Yamaguchi Hironori
Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University
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Kimura Shojiro
Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University
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Yasin Shadi
Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, D-01314 Dresden, Germany
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Zherlitsyn Sergei
Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, D-01314 Dresden, Germany
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Omura Kumiko
KYOKUGEN, Osaka University, Toyonaka, Osaka 560-8531, Japan
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He Zhangzhen
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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Yoshii Shunsuke
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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OKUNISHI Kouichi
Department of Applied Physics, Graduate School of Engineering Osaka University
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Okunishi Kouichi
Department of Physics, Niigata University, Niigata 950-2181, Japan
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Taniyama Tomoyasu
Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Taniyama Tomoyasu
Materials and Structure Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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TANIYAMA Tomoyasu
Materials and Structure Laboratory, Tokyo Institute of Technology
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