Spin excitation spectrum in a magnetic nanodot with continuous transitions between the vortex, Bloch-type skyrmion, and Néel-type skyrmion states

M. Mruczkiewicz, M. Krawczyk, and K. Y. Guslienko
Phys. Rev. B 95, 094414 – Published 13 March 2017

Abstract

We study spin-wave excitations in a circular ferromagnetic nanodot in different inhomogeneous, topologically nontrivial magnetization states, specifically, vortex and skyrmion states. Gradual change in the strength of the out-of-plane magnetic anisotropy and the Dzyaloshinskii-Moriya exchange interaction leads to continuous phase transitions between different stable magnetic configurations and allows for mapping of dynamic spin modes in and between the vortex, Bloch-type skyrmion, and Néel-type skyrmion states. Our study elucidates the connections between gyrotropic modes, azimuthal spin waves, and breathing modes in these various stable magnetization states and helps us to understand the rich spin excitation spectrum on the skyrmion background.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 11 October 2016
  • Revised 21 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.094414

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

M. Mruczkiewicz1,*, M. Krawczyk2,†, and K. Y. Guslienko3,4,‡

  • 1Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 841 04 Bratislava, Slovakia
  • 2Faculty of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, Poznań, 61-614, Poland
  • 3Departamento de Fisica de Materiales, Universidad del Pais Vasco, UPV/EHU, 20018 San Sebastian, Spain
  • 4IKERBASQUE, the Basque Foundation for Science, 48013 Bilbao, Spain

  • *m.mru@amu.edu.pl
  • krawczyk@amu.edu.pl
  • kostyantyn.gusliyenko@ehu.eus

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 95, Iss. 9 — 1 March 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×