Theory of magnetic inertial dynamics in two-sublattice ferromagnets

Abstract

The magnetic inertial dynamics have 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 is contrasting.

14 pages, 4 figures

References in corpus (7)

• All-optical control of ferromagnetic thin films and nanostructures
• Identification of the dominant precession damping mechanism in Fe, Co, and Ni by first-principles calculations
• Spin orbit precession damping in transition metal ferromagnets
• Relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz-Gilbert equation of spin dynamics
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• Nutation in antiferromagnetic resonance
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Cited by in corpus (11)

• Inertial spin dynamics in epitaxial cobalt films
• Nutation spin waves in ferromagnets
• Inertial spin waves in ferromagnets and antiferromagnets
• Theory of inertial spin dynamics in anisotropic ferromagnets
• Spin pumping at terahertz nutation resonances
• Influence of inter-sublattice coupling on the terahertz nutation spin dynamics in antiferromagnets
• Unified framework of the microscopic Landau-Lifshitz-Gilbert equation and its application to Skyrmion dynamics
• Theory of tensorial magnetic inertia in terahertz spin dynamics
• Engineering spin-wave spectrum via the magnetization inertia tensor
• Chirality and polarization of inertial antiferromagnetic resonances driven by spin-orbit torques
• Magnetization switching in the inertial regime