Voltage controlled core reversal of fixed magnetic skyrmions without a magnetic field

Abstract

Using micromagnetic simulations we demonstrate core reversal of a fixed magnetic skyrmion by modulating the perpendicular magnetic anisotropy of a nanomagnet with an electric field. We can switch reversibly between two skyrmion states and two ferromagnetic states, i.e. skyrmion states with the magnetization of the core pointing down/up and periphery pointing up/down, and ferromagnetic states with magnetization pointing up/down, by sequential increase and decrease of the perpendicular magnetic anisotropy. The switching between these states is explained by the fact that the spin texture corresponding to each of these stable states minimizes the sum of the magnetic anisotropy, demagnetization, Dzyaloshinskii-Moriya interaction (DMI) and exchange energies. This could lead to the possibility of energy efficient nanomagnetic memory and logic devices implemented with fixed skyrmions without using a magnetic field and without moving skyrmions with a current.

References in corpus (5)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu2OSeO3
• Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots
• Magneto-elastic universal logic gate: A non-volatile, error-resilient Boolean logic gate with ultra-low energy-delay product

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