Theory of vortex states in magnetic nanodisks with induced Dzyaloshinskii-Moriya interactions

Details Theory of vortex states in magnetic nanodisks with induced Dzyaloshinskii-Moriya interactions Theory of vortex states in magnetic nanodisks with induced Dzyaloshinskii-Moriya interactions

2009-06-30

arxiv.org/abs/0906.5552v2

Phys. Rev. B 80, 134410 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures

Scientific paper

10.1103/PhysRevB.80.134410

Vortex states in magnetic nanodisks are essentially affected by surface/interface induced Dzyaloshinskii-Moriya interactions. Within a micromagnetic approach we calculate the equilibrium sizes and shape of the vortices as functions of magnetic field, the material and geometrical parameters of nanodisks. It was found that the Dzyaloshinskii-Moriya coupling can considerably increase sizes of vortices with "right" chirality and suppress vortices with opposite chirality. This allows to form a bistable system of homochiral vortices as a basic element for storage applications.

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