Frequency Dependence of Resonance Field of One-Dimensional Heisenberg Antiferromagnet KCuF3  

作　　者：史庆藩 吕震 马牧燕 马超 李粮生 

机构地区：[1]Department of Physics, Faculty of Science, Beiding Institute of Technology, Beijing 100081 [2]Department of Electric Engineering, Beijing Institute of.Machinery, Beijing 100085

出　　处：《Chinese Physics Letters》2006年第4期986-989,共4页中国物理快报（英文版）

摘　　要：The frequency dependence of the in-plane angular change of the antiferromagnetic resonance （AFMR） field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6 GHz at 4.2K. The effect of inequivalent g-tensors is found to gradually diminish with decreasing the frequency, and completely vanish when the frequency is decreased to the lower-frequency branch of C-band, while the effect of the effective anisotropy field is significantly enhanced with decreasing the frequency. The calculated AFMR field Hres based on the eight-sublattice model proposed by Yamada and Kato [J. Phys. Soc. Jpn. 63 （1994）289] is in good agreement with the experimental data.The frequency dependence of the in-plane angular change of the antiferromagnetic resonance （AFMR） field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6 GHz at 4.2K. The effect of inequivalent g-tensors is found to gradually diminish with decreasing the frequency, and completely vanish when the frequency is decreased to the lower-frequency branch of C-band, while the effect of the effective anisotropy field is significantly enhanced with decreasing the frequency. The calculated AFMR field Hres based on the eight-sublattice model proposed by Yamada and Kato [J. Phys. Soc. Jpn. 63 （1994）289] is in good agreement with the experimental data.

关 键 词：ANTISYMMETRIC EXCHANGE INTERACTION INEQUIVALENT G-TENSORS WEAKFERROMAGNETISM LOW-TEMPERATURES BEHAVIOR 

分 类 号：O482.525[理学—固体物理]