Fast and deterministic switching of a vortex core induced by an out-of-plane current in notch disks
Abstract
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.
- Publication:
-
Nanotechnology
- Pub Date:
- May 2020
- DOI:
- 10.1088/1361-6528/ab70f9
- arXiv:
- arXiv:1909.06926
- Bibcode:
- 2020Nanot..31t5302L
- Keywords:
-
- spin transfer torque;
- magnetic vortex;
- polarity switching;
- Physics - Applied Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- doi:10.1088/1361-6528/ab70f9