Fast and deterministic switching of vortex core induced by out-of-plane current in notch disks

TL;DR

This paper presents a novel notch disk design enabling fast, deterministic vortex core switching with reduced energy and time, using out-of-plane current, improving reliability for magnetic applications.

Contribution

The study introduces a notch structure in disks that allows for fast, deterministic vortex core switching with lower energy and reduced switching time, avoiding previous multiple switching issues.

Findings

Switching time reduced by over 50% with notch design

Deterministic vortex core switching achieved

Out-of-plane current enables reliable switching

Abstract

Magnetic vortex, as one of the most interesting magnetic solitons, has attracted great interests in the past two decades. A fast and reliable method to switch vortex polarity and chirality is one of the key issues for various applications. Based on micromagnetic simulation, here we report a fast, low energy cost and deterministic switching of vortex core, through the designing of a notch structure in disks and the use of out-of-plane current geometry. We demonstrate that with such design, the multiple switching problems found in notch disk system can be avoided. Furthermore, the switching time can be reduced by more than 50% compared with disks without notch.