Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators

Abstract

We study the role of thermal magnons in the spin and heat transport across a normal-metal/insulating-ferromagnet interface, which is beyond an elastic electronic spin transfer. Using an interfacial exchange Hamiltonian, which couples spins of itinerant and localized orbitals, we calculate spin and energy currents for an arbitrary interfacial temperature difference and misalignment of spin accumulation in the normal metal relative to the ferromagnetic order. The magnonic contribution to spin current leads to a temperature-dependent torque on the magnetic order parameter; reciprocally, the coherent precession of the magnetization pumps spin current into the normal metal, the magnitude of which is affected by the presence of thermal magnons.

References in corpus (4)

• Spin Transfer Torques
• Spin Seebeck insulator
• Electronic control of the spin-wave damping in a magnetic insulator
• Dynamic phase diagram of dc-pumped magnon condensates

Cited by in corpus (10)

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• Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
• Observation of nuclear-spin Seebeck effect
• Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum
• Temperature dependence of the effective spin-mixing conductance probed with lateral non-local spin valves
• Thermally induced spin torque and domain wall motion in superconductor/antiferromagnetic insulator bilayers
• Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures
• Spin Seebeck effect and phonon energy transfer in heterostructures containing layers of a normal metal and a ferromagnetic insulator
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer
• Magnetically Ordered Insulators for Advanced Spintronics