期刊
SOLID STATE COMMUNICATIONS
卷 121, 期 11, 页码 625-629出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0038-1098(02)00061-3
关键词
magnetically ordered materials; phase transitions; spin dynamics; neutron scattering
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.
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