Journal of Physics: Condensed Matter ( IF 2.3 ) Pub Date : 2021-05-28 , DOI: 10.1088/1361-648x/abfc6d Ritwik Mondal
The magnetic inertial dynamics have previously been investigated for one sublattice ferromagnets. Here, we develop the magnetization dynamics in two-sublattice ferromagnets including the intra- and inter-sublattice inertial dynamics. First, we derive the magnetic susceptibility of such a ferromagnet. Next, by finding the poles of the susceptibility, we calculate the precession and nutation resonance frequencies. Our results suggest that while the resonance frequencies show decreasing behavior with the increasing intra-sublattice relaxation time, the effect of inter-sublattice inertial dynamics has an opposite effect.
中文翻译:
二亚晶格铁磁体中的磁惯性动力学理论
先前已经研究了一种亚晶格铁磁体的磁惯性动力学。在这里,我们开发了两个亚晶格铁磁体的磁化动力学,包括亚晶格内和亚晶格间惯性动力学。首先,我们推导出这种铁磁体的磁化率。接下来,通过找到磁化率的极点,我们计算进动和章动共振频率。我们的结果表明,虽然共振频率显示出随着亚晶格内弛豫时间的增加而降低的行为,但亚晶格间惯性动力学的影响具有相反的效果。