Coexistence of long-range order and spin fluctuation in geometrically frustrated clinoatacamite Cu2Cl(OH)3.
Coexistence of long-range order and spin fluctuation in geometrically frustrated clinoatacamite Cu2Cl(OH)3.
复制标题
DOI：
10.1103/physrevlett.95.057201
复制
发表时间：
2005-07
影响因子：
8.6
通讯作者：
X. G. Zheng;H. Kubozono;K. Nishiyama;W. Higemoto;T. Kawae;A. Koda;C. N. Xu
中科院分区：
文献类型：
--
作者：
X. G. Zheng;H. Kubozono;K. Nishiyama;W. Higemoto;T. Kawae;A. Koda;C. N. Xu
在斜氯铜矿Cu 2Cl（OH）3上进行了μ子自旋旋转实验，Cu 2Cl（OH）3是一个新的几何阻挫系统，具有三维共角四面体3dCu ~（2+）自旋网络.一个长程反铁磁秩序发生低于18.1 K与一个令人惊讶的小熵释放约0.05Rln2/Cu。低于6.5 K，静态长程有序突然转变为亚稳态，μ子自旋几乎完全去极化，这表明强烈的波动。然后，系统进入一个状态，其中部分长程有序和自旋涨落共存的最低实验可达到的温度为20 mK。这项工作提出了一个新的系统研究几何挫折。
Muon spin rotation experiments are carried out on clinoatacamite, Cu2Cl(OH)3, which is a new geometrically frustrated system featuring a three-dimensional network of corner-sharing tetrahedral 3d Cu2+ spins. A long-range antiferromagnetic order occurs below 18.1 K with a surprisingly small entropy release of about 0.05Rln2/Cu. Below 6.5 K, the static long-range order transforms abruptly into a metastable state with nearly complete depolarization of muon spins which suggests strong fluctuation. The system then enters a state in which partial long-range order and spin fluctuation coexist down to the lowest experimentally attainable temperature of 20 mK. This work presents a novel system for studying geometric frustration.