反铁磁体中反应性和耗散性章动的现象学
Phenomenology of reactive and dissipative nutation in antiferromagnets
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中文总结 AI 辅助
本文为多子晶格磁体制定含惯性阻尼的磁化运动方程,推导反铁磁体动态磁化率与近似本征频率,揭示惯性阻尼对章动模式弛豫的影响,并提出实验测定动力学系数的方案。
中文摘要 AI 辅助
我们为多子晶格磁体中的均匀磁化动力学制定了运动方程,重点研究最近提出的惯性阻尼力矩。我们纳入了吉尔伯特阻尼、反应性惯性和惯性阻尼的子晶格内和子晶格间贡献。对于易轴静磁场中的双子晶格单轴反铁磁体,我们推导了所有场依赖平衡相中的动态磁化率和近似本征频率。特别地,我们展示了惯性阻尼如何影响章动模式的弛豫,并提出了一种实验方案来确定动力学系数。
英文摘要
We formulate equations of motion for uniform magnetization dynamics in multisublattice magnets, with emphasis on a recently proposed inertial damping torque. We include intra- and intersublattice contributions to Gilbert damping, reactive inertia, and inertial damping. For a two-sublattice uniaxial antiferromagnet in an easy-axis static magnetic field, we derive the dynamical magnetic susceptibilities and approximate eigenfrequencies across all field-dependent equilibrium phases. In particular, we show how inertial damping affects the relaxation of the nutational modes and propose an experimental protocol to determine the dynamical coefficients.
发表机构
- Norwegian University of Science and Technology(挪威科技大学)
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