Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

Abstract

We provide a macroscopic theory and experimental results for magnetic resonances of antiferromagnetically-coupled ferrimagnets. Our theory, which interpolates the dynamics of antiferromagnets and ferromagnets smoothly, can describe ferrimagnetic resonances across the angular momentum compensation point. We also present experimental results for spin-torque induced ferrimagnetic resonance at several temperatures. The spectral analysis based on our theory reveals that the Gilbert damping parameter, which has been considered to be strongly temperature dependent, is insensitive to temperature. We envision that our work will facilitate further investigation of ferrimagnetic dynamics by providing a theoretical framework suitable for a broad range of temperatures.

arXiv comment16 pages, 4 figures

References in corpus (11)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets
• Spin-orbit driven ferromagnetic resonance: A nanoscale magnetic characterisation technique
• Current-induced domain wall motion in compensated ferrimagnet
• Self-Focusing Skyrmion Racetracks in Ferrimagnets
• Gilbert damping phenomenology for two-sublattice magnets
• Correlation between Compensation Temperatures of Magnetization and Angular Momentum in GdFeCo Ferrimagnets
• Low magnetic damping of ferrimagnetic GdFeCo alloys
• Macroscopic Quantum Coherence in Ferrimagnets

Cited by in corpus (6)

• Switching magnon chirality in artificial antiferromagnet
• Ultrathin ferrimagnetic GdFeCo films with very low damping
• Observation of spin-motive force in ferrimagnetic GdFeCo alloy films
• Effects of spin-orbit torque on the ferromagnetic and exchange spin wave modes in ferrimagnetic CoGd alloy
• Temperature dependence of the damping parameter in the ferrimagnet Gd${}_3$Fe${}_5$O${}_{12}$
• Magnetic resonance frequency of two-sublattice ferrimagnet with magnetic compensation temperature