Theory of inertial spin dynamics in anisotropic ferromagnets

Autor: Mikhail Cherkasskii, Igor Barsukov, Ritwik Mondal, Michael Farle, Anna Semisalova
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Popis: 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 the noninertial 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 noninertial theory and thus allow for convenient estimates of the inertial effects.
Databáze: OpenAIRE