Magnetic Field-Temperature Phase Diagram of the Ferro-quadrupolar State and Crystal Electric Field Effect in UCu2Sn

被引：1

作者：

Ishii, Isao ^{[1
]}

Katoh, Kenichi ^{[2
]}

Takabatake, Toshiro ^{[1
,3
]}

Hashio, Susumu ^{[4
]}

Tamaki, Akira ^{[4
]}

Suzuki, Takashi ^{[1
,3
,5
]}

机构：

[1] Hiroshima Univ, ADSM, Dept Quantum Matter, Hiroshima 7398530, Japan

[2] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan

[3] Hiroshima Univ, Inst Adv Mat Res, Hiroshima 7398530, Japan

[4] Tokyo Denki Univ, Dept Mat Sci & Engn, Chiyoda Ku, Tokyo 1018457, Japan

[5] Hiroshima Univ, N BARD, Cryogen & Instrumental Anal Div, Hiroshima 7398526, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2012年 / 81卷 / 02期

关键词：

quadrupolar ordering; crystal electric field effect; elastic modulus; elastic softening; UNISN;

D O I：

10.1143/JPSJ.81.024602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ternary uranium compound UCu2Sn shows a ferro-quadrupolar transition at T-Q = 16K originating from the ordering of the non-Kramers doublet Gamma(5) ground state. To investigate the magnetic field-temperature phase diagram of the ferro-quadrupolar state in UCu2Sn, we measured elastic modulus C-66 at magnetic fields of up to 14 T. We found an anisotropic field dependence of T-Q(H) in H parallel to [(1) over bar2 (1) over bar0], [0001], and [01 (1) over bar0]. We optimized the crystal electric field level scheme using C-66 under fields, magnetic susceptibility, and electronic entropy. The quadrupolar phase diagram is well reproduced by the obtained level scheme.

引用

页数：5

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