Unidirectional switching of magnetic vortex core confined in a cylindrical nanocavity

Ultrafast unidirectional reversal of magnetic vortex core confined in a cylindrical nanocavity is numerically investigated using micromagnetic simulations for the permalloy nanodisk. The excited modes (convergence/divergence) of the core motion are modulated differently by the cavity, depending on t...

Full description

Saved in:
Bibliographic Details
Published in:Japanese Journal of Applied Physics 2019-10, Vol.58 (10), p.100909
Main Authors: Ma, Xiao-Ping, Shim, Je-Ho, Piao, Hong-Guang, Kim, Dong-Hyun, Kim, Dong-Eon
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ultrafast unidirectional reversal of magnetic vortex core confined in a cylindrical nanocavity is numerically investigated using micromagnetic simulations for the permalloy nanodisk. The excited modes (convergence/divergence) of the core motion are modulated differently by the cavity, depending on the dimension of the cavity, which is the main reason for the unidirectional vortex polarization switching. Assisted with the cavity, the core can be reversed well below 200 ps with less than 10 mT external magnetic field and over a wide range of field frequency. In particular, the core can be selectively switched by varying the dimension of the cylindrical cavity.
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/ab42f9