Gyrotropic skyrmion modes in ultrathin magnetic circular dots
Abstract
We calculate lowfrequency gyrotropic spin excitation modes of the skyrmion ground state ultrathin cylindrical magnetic dots. The skyrmion is assumed to be stabilized at room temperature and zero external magnetic field due to an interplay of the isotropic and DzyaloshinskiiMoriya exchange interactions, perpendicular magnetic anisotropy and magnetostatic interaction. We consider Bloch and Neeltype magnetic skyrmions and assume that the dot magnetization does not depend on the thickness coordinate. The skyrmion gyrotropic frequencies are calculated in GHz range as a function of the skyrmion equilibrium radius, dot radius and the dot magnetic parameters. Recent experiments on magnetic skyrmion gyrotropic dynamics in nanodots are discussed.
 Publication:

arXiv eprints
 Pub Date:
 February 2016
 arXiv:
 arXiv:1603.00072
 Bibcode:
 2016arXiv160300072G
 Keywords:

 Nonlinear Sciences  Pattern Formation and Solitons;
 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 7 pages, 2 figures