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

• Published in: Nanotechnology Vol. 31; no. 20; p. 205302
• Main Authors: Luo, Y M, Wu, Y Z, Qian, Z H, Wen, J H, Li, H, Yu, C Q, Zhu, L Y, Wang, L, Xu, L, Bai, R, Zhou, T J
• Format: Journal Article
• Language: English
• Published: England 15.05.2020
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/1361-6528/ab70f9

The magnetic vortex, as one of the most interesting magnetic solitons, has attracted great interest over 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 a vortex core, by the designing of a notch structure in disks and the use of out-of-plane current geometry. We demonstrate that with such a design, the multiple switching problems found in notch disk systems can be avoided. Furthermore, the switching time can be reduced by more than 50% compared with disks without notches.