Skyrmions in an oblique field: A path to novel binary and quaternary memory

Autor:	Capic, Daniel, Garanin, Dmitry A., Chudnovsky, Eugene M.
Rok vydání:	2020
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We propose a novel binary and quaternary memory device based upon skyrmion states induced by the oblique field in a square magnetic island. To describe stable states and dynamics of the skyrmion, we employ the lattice model that uses the parameters of a real material and accounts for all relevant interactions. Depending on the orientation of the field, two or four spatially separated energy minima emerge in the oblique field. The energy barriers between the minima can be controlled by the strength and orientation of the magnetic field. We study the dynamics of the skyrmion and show that it can be moved between any two states by application of the field gradient. Islands of thickness of a few tens of atomic layers permit room-temperature manipulation of the proposed device. Comment: 9 pages, 12 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2009.05384 Zobrazit plný text záznamu View this record from Arxiv