Antiferromagnetic resonance in LaMnO3

被引：4
|
作者：
Mozhegorov, A. A. [1 ]
Gonchar, L. E. [1 ]
Nikiforov, A. E. [1 ]
机构：
[1] AM Gorkii State Univ, Ekaterinburg 620083, Russia
来源：
LOW TEMPERATURE PHYSICS | 2007年 / 33卷 / 2-3期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1063/1.2719960
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic structure of LaMnO3 and the antiferromagnetic resonance frequencies in it are investigated as functions of magnetic field H and temperature T. A previously developed model that includes the orbitally dependent superexchange and single-ion anisotropy is used. The temperature dependences described in the framework of the mean field approximation are in good agreement with experiment. The H-T phase diagrams are constructed for magnetic field directed along the principal crystallographic directions (a,b,c). The problem of the origin of the weak noncollinearity of the Mn3+ spins is solved. An optimal method of obtaining the expression for the magnetic free energy is proposed. (c) 2007 American Institute of Physics.
引用
收藏
页码：229 / 233
页数：5
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