Low power switching of magnetization using enhanced magnetic anisotropy with short-voltage-pulse application

Abstract

A low power magnetization switching scheme based on the voltage control of magnetic anisotropy (VCMA) is proposed. In contrast to the conventional switching scheme using VCMA, where the magnetic anisotropy is eliminated during the voltage pulse, the magnetic anisotropy is enhanced to induce precession around the axis close to the easy axis. After turning off the voltage proximately at a half of precession period, the magnetization relaxes to the opposite equilibrium direction. We perform numerical simulations and show that the pulse duration of the proposed switching scheme is as short as a few tens of pico seconds. Such a short pulse duration is beneficial for low power consumption because of the reduction of energy loss by Joule heating.