Quantum thermodynamics of complex ferrimagnets

Abstract

High-quality magnets such as yttrium iron garnet (YIG) are electrically insulating and very complex. By implementing a quantum thermostat into atomistic spin dynamics we compute YIG's key thermodynamic properties, viz. the magnon power spectrum and specific heat, for a large temperature range. The results differ (sometimes spectacularly) from simple models and classical statistics, but agree with available experimental data.

References in corpus (5)

• Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
• Quantitative simulation of temperature dependent magnetization dynamics and equilibrium properties of elemental ferromagnets
• Thermal spin dynamics of yttrium iron garnet
• The Final Chapter In The Saga Of YIG
• Ultra-fast spin dynamics: the effect of colored noise

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