Year: 2009
Type: article
Abstract: We consider a nanodisk possessing two coupled materials with different ferromagnetic exchange constants. The common borderline of the two media crosses at the disk center, dividing the system exactly in two similar half-disks. The vortex core motion crossing the interface is investigated using a two-dimensional model, which mimics a very thin, real material with such a line defect. The main result of this study is that, depending on the magnetic coupling which connects the media, the vortex core can be dramatically and repeatedly flipped up to down by the interface. This phenomenon produces a burstlike emission of spin waves each time the switching process takes place.
Source: Journal of Applied Physics
DOI: 10.1063/1.3057018
Authors: R. L. Silva, A. R. Pereira, W. A. Moura-Melo
Institution: Universidade Federal de Viçosa
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1998510706