Neutron scattering study of antiferromagnetic order in CaCu3Ti4O12

被引：83
|
作者：
Kim, YJ
Wakimoto, S
Shapiro, SM
Gehring, PM
Ramirez, AP
机构：
[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[2] MIT, Dept Phys, Cambridge, MA 02139 USA
[3] MIT, Ctr Mat Sci, Cambridge, MA 02139 USA
[4] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20889 USA
[5] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
SOLID STATE COMMUNICATIONS | 2002年 / 121卷 / 11期
基金：
美国国家科学基金会;
关键词：
magnetically ordered materials; phase transitions; spin dynamics; neutron scattering;
D O I：
10.1016/S0038-1098(02)00061-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Magnetism in a single crystal CaCu3Ti4O12 has been studied using elastic and inelastic neutron scattering. We have measured the order parameter of the antiferromagnetic phase transition at T-N = 24.1(1) K. The observed magnetic structure can be consistently described by spins ordered collinearly along the crystallographic [111] direction. A spin wave mode of omega = 7.3(4) meV has been observed and compared with a linear spin wave theory. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：625 / 629
页数：5
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