Magnetic vortex-antivortex crystals generated by spin-polarized current
arXiv:1206.4125 · doi:10.1103/PhysRevB.86.144401
Abstract
We study vortex pattern formation in thin ferromagnetic films under the action of strong spin-polarized currents. Considering the currents which are polarized along the normal of the film plane, we determine the critical current above which the film goes to a saturated state with all magnetic moments being perpendicular to the film plane. We show that stable square vortex-antivortex superlattices (\emph{vortex crystals}) appears slightly below the critical current. The melting of the vortex crystal occurs with current further decreasing. A mechanism of current-induced periodic vortex-antivortex lattice formation is proposed. Micromagnetic simulations confirm our analytical results with a high accuracy.
12 pages, 11 figures
References in corpus (6)
- Spontaneous Skyrmion Ground States in Magnetic Metals
- Excitation of spin dynamics by spin-polarized current in vortex state disks
- Vortex polarity switching by a spin--polarized current
- Switching of the vortex polarity in a magnetic nanodisk by a DC current
- Effective anisotropy of thin nanomagnets: beyond the surface anisotropy approach
- Vortex lattices for ultracold bosonic atoms in a non-Abelian gauge potential
Cited by in corpus (5)
- Magnetic bimerons as skyrmion analogues in in-plane magnets
- Dynamic control of spin wave spectra using spin-polarized currents
- Periodic magnetic structures generated by spin-polarized currents in nanostripes
- Periodic magnetization structures generated by transverse spin-current in magnetic nanowires
- Circular stripe domains and cone state vortices in disk-shaped exchange coupled magnetic heterostructures