Theory of inertial spin dynamics in anisotropic ferromagnets
Mesoscale and Nanoscale Physics
2022-08-30 v2
Abstract
Recent experimental observation of inertial spin dynamics calls upon holistic reevaluation of the theoretical framework of magnetic resonance in ferromagnets. Here, we derive the secular equation of an inertial spin system in analogy to the ubiquitous Smit-Beljers formalism. We find that the frequency of precessional ferromagnetic resonances is decreased as compared to non-inertial case. We also find that the frequency of nutational resonances is generally increased due to the presence of magnetic anisotropy and applied magnetic field. We obtain exact solutions of the secular equation and approximations that employ the terminology of non-inertial theory and thus allow for convenient estimates of the inertial effects.
Keywords
Cite
@article{arxiv.2204.11057,
title = {Theory of inertial spin dynamics in anisotropic ferromagnets},
author = {Mikhail Cherkasskii and Igor Barsukov and Ritwik Mondal and Michael Farle and Anna Semisalova},
journal= {arXiv preprint arXiv:2204.11057},
year = {2022}
}