Thermal Response Functions of Insulating Magnets Near and Beyond Critical Temperature*

Thermal response coefficients of magnetic materials are of significant interest in the field of spintronics; understanding spin dynamics in response to a thermal gradient paves the way for energy-efficient spin manipulation via thermal fluctuations. We investigate thermal response in magnetic systems, particularly near and above the critical temperature, by simulating the dynamics of these systems and calculating the spin and energy currents that appear. Applying linear response theory, we predict the thermal conductivities of both spin and energy, which provide insight into how thermally-induced fluctuations impact transport in magnetic systems and deepen the understanding of the general effect of fluctuations on non-trivial magnetic topology.