Vortex gyrotropic mode in curved nanodots

•Vortex gyrotropic mode frequency depends on the nanodot curvature parameter.•The uniform out of plane magnetization is forming in the apex of the curved nanodots.•Vortex gyrotropic frequency is influenced strongly by the magnetization state of the nanodot apex.•The apex influence on the vortex osci...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2021-11, Vol.537, p.168105, Article 168105
Main Authors: Bublikov, K., Tóbik, J., Sadovnikov, A.V., Mruczkiewicz, M.
Format: Article
Language:English
Subjects:
Curvature
Curved-shape magnetic nanodot
Gyrotropic mode
Magnetic vortex
Magnetism in 3D structures
Nanodot
Oscillators
Phase transitions
Rounding
Vortices
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:•Vortex gyrotropic mode frequency depends on the nanodot curvature parameter.•The uniform out of plane magnetization is forming in the apex of the curved nanodots.•Vortex gyrotropic frequency is influenced strongly by the magnetization state of the nanodot apex.•The apex influence on the vortex oscillations can be diminished by the magnetic field. In this work, we present the influence of the curvature of magnetic nanodot on the vortex gyrotropic mode frequency. We show that gyrotropic oscillation of the magnetic vortices is highly influenced by the rounding of the nanodot shape due to the formation of the apex and single domain state in the upper part of the dot. The curved shape of nanodot could arise during the fabrication process of the nanodots, i.e., during lithography. We find that strong dependence of the gyrotropic mode frequency on curvature parameter is related to magnetic phase transition: from vortex to out-of-plane state. The found effect can be used, e.g., for the design of the spin torque nano oscillators.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2021.168105