Unconventional magnetic transitions in the mineral clinoatacamite Cu2Cl(OH)3

被引：105

作者：

Zheng, XG ^{[1
]}

Kawae, T

Kashitani, Y

Li, CS

Tateiwa, N

Takeda, K

Yamada, H

Xu, CN

Ren, Y

机构：

[1] Saga Univ, Dept Phys, Saga 8408502, Japan

[2] Kyushu Univ, Fac Engn, Fukuoka 8128581, Japan

[3] Natl Inst Adv Ind Sci & Technol, Saga 8410052, Japan

[4] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.71.052409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Unconventional magnetic properties are found for a quantum spin system of mineral clinoatacamite, Cu2Cl(OH)(3). Clinoatacamite is found to undergo an antiferromagnetic transition at 18.1 K with a small entropy fall (0.05R In 2). At temperatures below 6.4 K, it transits into a disordered spin-glass-like state but with large specific heat anomalies. The entire entropy fall for the spin system is about 0.31R In 2, which is smaller than those for dipolar spin ice (0.67R ln 2) and for ice I-h (0.71R ln 2). Geometric frustration for the quantum Cu2+ spins is suggested based on its crystal structure, magnetization, and specific heat studies.

引用

页数：4

共 12 条

[1] MAGNETIC SUSCEPTIBILITY OF MNF2 NEAR TN AND FISHERS RELATION [J].