Magnetic Domain Wall Floating on a Spin Superfluid

Abstract

We theoretically investigate the transfer of angular momentum between a spin superfluid and a domain wall in an exchange coupled easy-axis and easy-plane magnetic insulator system. A domain wall in the easy-axis magnet absorbs spin angular momentum via disrupting the flow of a superfluid spin current in the easy-plane magnet. Focusing on an open geometry, where the spin current is injected electrically via a nonequilibrium spin accumulation, we derive analytical expressions for the resultant superfluid-mediated motion of the domain wall. The analytical results are supported by micromagnetic simulations. The proposed phenomenon extends the regime of magnon-driven domain-wall motion to the case when the magnons are condensed and exhibit superfluidity. Furthermore, by controlling the pinning of the domain wall, we propose a realization of a reconfigurable spin transistor. The long-distance dissipationless character of spin superfluids can thus be exploited for manipulating soliton-based memory and logic devices.

5 pages, 3 figures, supplementary

References in corpus (7)

• Thermally Driven Ratchet Motion of Skyrmion Microcrystal and Topological Magnon Hall Effect
• Dynamics of domain walls in magnetic nanostrips
• Magnon-skyrmion scattering in chiral magnets
• Superfluid spin transport through antiferromagnetic insulators
• Skyrmionic spin Seebeck effect via dissipative thermomagnonic torques
• Spin Hall phenomenology of magnetic dynamics
• Non-Local Transport Mediated by Spin-Supercurrents

Cited by in corpus (2)

• The dynamics of bimeron skyrmions in easy-plane magnets induced by a spin supercurrent
• Local thermomagnonic torques in two-fluid spin dynamics