Deflection of a vortex pair by an interface in easy-plane ferromagnets

Autor:	Yu. B. Gaididei, Juan P. Zagorodny, Franz G. Mertens, Jean-Guy Caputo
Rok vydání:	2003
Předmět:	Physics Condensed matter physics Plane (geometry) Heisenberg model General Physics and Astronomy Motion (geometry) Statistical and Nonlinear Physics Vortex Core (optical fiber) Classical mechanics Deflection (physics) Ferromagnetism Anisotropy Mathematical Physics
Zdroj:	Journal of Physics A: Mathematical and General. 36:4259-4267
ISSN:	1361-6447 0305-4470
DOI:	10.1088/0305-4470/36/15/303
Popis:	We study the motion of a vortex–antivortex pair in easy-plane ferromagnets crossing an interface between two media with different anisotropy. A simple description based on the Thiele approach is obtained. The collective variables are the vortex centres and core radii, the latter are assumed to be slaved to the former. For a normal crossing of the interface by the vortex pair, a simple estimate of the ratio of the separation distances is obtained from energy conservation. This prediction is validated by direct numerical simulations of the Landau–Lifshitz equations for the anisotropic Heisenberg model, on a spin lattice divided into two regions which have different anisotropies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71afff838801a91186d444b75dfef3d5 https://doi.org/10.1088/0305-4470/36/15/303 Zobrazit plný text záznamu