Energy Storage via Topological Spin Textures
arXiv:1808.02461 · doi:10.1103/PhysRevLett.121.127701
Abstract
We formulate an energy-storage concept based on the free energy associated with metastable magnetic configurations. Despite the active, magnetic region of the battery being electrically insulating, it can sustain effective hydrodynamics of spin textures, whose conservation law is governed by topology. To illustrate the key physics and potential functionality, we focus here on the simplest quasi-one-dimensional case of planar winding of the magnetic order parameter. The energy is stored in the metastable winding number, which can be injected electrically by an appropriately tailored spin torque. Due to the nonvolatility and the endurance of magnetic systems, the injected energy can be stored essentially indefinitely, with charging/discharging cycles that do not degrade over time.
5 pages, 1 figure
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- Perspective: (Beyond) spin transport in insulators
- Antiferromagnet-Based Neuromorphics Using Dynamics of Topological Charges
- Hydrodynamics of three-dimensional skyrmions in frustrated magnets
- Stabilization of the skyrmion crystal phase in thin-film antiferromagnets
- Energy storage in magnetic textures driven by vorticity flow
- Zeeman term for the Néel vector in a two sublattice antiferromagnet using Dzyaloshinsky-Moriya interaction and magnetic field
- Topological energy release from collision of relativistic antiferromagnetic solitons
- Topological transport of vorticity on curved magnetic membranes
- Tunable Ultrafast Dynamics of Antiferromagnetic Vortices in Nanoscale Dots
- Nematronics: Reciprocal coupling between ionic currents and nematic dynamics