Vortices and chirality of magnetostatic modes in quasi-2D ferrite disk particles

Details Vortices and chirality of magnetostatic modes in quasi-2D ferrite disk particles Vortices and chirality of magnetostatic modes in quasi-2D ferrite disk particles

2007-02-14

arxiv.org/abs/cond-mat/0702327v1

J. Phys. A: Math. Theor. 40 (2007) 6539-6559

Physics

Condensed Matter

Materials Science

Scientific paper

10.1088/1751-8113/40/24/017

In this paper we show that the vortex states can be created not only in magnetically soft "small" (with the dipolar and exchange energy competition) cylindrical dots, but also in magnetically saturated "big" (when the exchange is neglected) cylindrical dots. A property associated with a vortex structure becomes evident from an analysis of confinement phenomena of magnetic oscillations in a ferrite disk with a dominating role of magnetic-dipolar (non-exchange-interaction) spectra. In this case the scalar (magnetostatic-potential) wave functions may have a phase singularity in a center of a dot. A non-zero azimuth component of the flow velocity demonstrates the vortex structure. The vortices are guaranteed by the chiral edge states of magnetic-dipolar modes in a quasi-2D ferrite disk.

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