Theory of magnetic inertial dynamics in two-sublattice ferromagnets

0552410 - FZÚ 2022 RIV GB eng J - Journal Article
Mondal, Ritwik
Theory of magnetic inertial dynamics in two-sublattice ferromagnets.
Journal of Physics-Condensed Matter. Roč. 33, č. 27 (2021), č. článku 275804. ISSN 0953-8984. E-ISSN 1361-648X
Institutional support: RVO:68378271
Keywords : ferromagnets * intra- and inter-sublattice inertial dynamics * ILLG equations of motion
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.745, year: 2021
Method of publishing: Open access

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 behaviour with the increasing intra-sublattice relaxation time, the effect of inter-sublattice inertial dynamics has an opposite effect.
Permanent Link: http://hdl.handle.net/11104/0327643