Short Range Order Effects on EPR Frequencies in Heisenberg Linear Chain Antiferromagnets
Short Range Order Effects on EPR Frequencies in Heisenberg Linear Chain Antiferromagnets
复制标题
海森堡线性链反铁磁体中 EPR 频率的短程有序效应
DOI：
10.1143/jpsj.32.337
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发表时间：
1972
影响因子：
1.7
通讯作者：
Y. Tazuke
中科院分区：
文献类型：
--
作者：
K. Nagata;Y. Tazuke
针对两种典型的一维海森堡反铁磁体CsMnCl 3 2H 2 O和(CH 3 ) 4 NMnCl 3 ，从理论上和实验上研究了短程有序自旋态顺磁共振频率的温度依赖性。采用经典最近邻海森堡模型的本理论正确地预测了两种晶体的谐振场从高温极限的偏移。观察到的 CsMnCl 3·2H 2 O 的位移只能用偶极项来解释。然而，对于(CH 3 ) 4 NMnCl 3 ，在解释温度变化时必须考虑单离子各向异性或D项的影响。
The temperature dependence of paramagnetic resonance frequencies in a short range ordered spin state is studied theoretically and experimentally for two typical one-dimensional Heisenberg antiferromagnets, CsMnCl 3 2H 2 O and (CH 3 ) 4 NMnCl 3 . The present theory with the classical nearest-neighbor Heisenberg model properly predicts the shift of the resonant field from the high temperature limit for both crystals. The observed shift for CsMnCl 3 2H 2 O can be explained only by the dipolar term. For (CH 3 ) 4 NMnCl 3 , however, the effect of the single-ion anisotropy, or the D -term, has to be taken into account in the explanation of the temperature variation.