Switching phenomena in magnetic vortex dynamics
Yuri B. Gaididei, Volodymyr P. Kravchuk, Franz G. Mertens, Denis D., Sheka
TL;DR
This paper provides a theoretical analysis of vortex polarity switching in magnetic nanoparticles, revealing a universal mechanism involving vortex-antivortex pair creation and annihilation, regardless of excitation method.
Contribution
It introduces a detailed theoretical description of the switching process, highlighting the creation and annihilation of vortex-antivortex pairs as a key mechanism.
Findings
Switching mechanism involves vortex-antivortex pair dynamics
Process is insensitive to excitation method
Provides detailed theoretical model of vortex polarity switching
Abstract
A magnetic nanoparticle in a vortex state is a promising candidate for the information storage. One bit of information corresponds to the upward or downward magnetization of the vortex core (vortex polarity). Generic properties of the vortex polarity switching are insensitive of the way how the vortex dynamics was excited: by an AC magnetic field, or by an electrical current. We study theoretically the switching process and describe in detail its mechanism, which involves the creation and annihilation of an intermediate vortex-antivortex pair.
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