Multiple vortex-antivortex pair generation in magnetic nanodots
- 26 March 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 81 (9)
- https://doi.org/10.1103/physrevb.81.094431
Abstract
The interaction of a magnetic vortex with a rotating magnetic field causes the nucleation of a vortex-antivortex pair leading to a vortex polarity switching. The key point of this process is the creation of a dip, which can be interpreted as a nonlinear resonance in the system of certain magnon modes with nonlinear coupling. The usually observed single-dip structure is a particular case of a multidip structure. The dynamics of the structure with dips is described as the dynamics of nonlinearly coupled modes with azimuthal numbers . The multidip structure with arbitrary number of vortex-antivortex pairs can be obtained in vortex-state nanodisk using a space- and a time-varying magnetic fields. A scheme of a possible experimental setup for multidip structure generation is proposed. DOI: http://dx.doi.org/10.1103/PhysRevB.81.094431 © 2010 The American Physical Society
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