Novel Phase Transition Probed by Sound Velocity in Quasi-One-Dimensional Ising-Like Antiferromagnet BaCo2V2O8

被引：14

作者：

Yamaguchi, Hironori ^{[1
]}

Yasin, Shadi ^{[2
]}

Zherlitsyn, Sergei ^{[2
]}

Omura, Kumiko ^{[1
]}

Kimuray, Shojiro ^{[1
]}

Yoshii, Shunsuke ^{[3
]}

Okunishi, Kouichi ^{[4
]}

He, Zhangzhen ^{[5
]}

Taniyama, Tomoyasu ^{[6
]}

Itoh, Mitsuru ^{[6
]}

Hagiwaraz, Masayuki ^{[1
]}

机构：

[1] Osaka Univ, KYOKUGEN, Osaka 5608531, Japan

[2] Forschungszentrum Dresden Rossendorf, Hochfeld Magnetlab Dresden HLD, D-01314 Dresden, Germany

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[4] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[5] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian 350002, Peoples R China

[6] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 03期

关键词：

ultrasound; magnetostriction; quantum spin chain; BaCo2V2O8; pulsed high magnetic field; EXPONENTS; CHAIN;

D O I：

10.1143/JPSJ.80.033701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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