Micromagnetic modelling of anisotropic damping in ferromagnet

Autor:	Dvornik, Mykola, Vansteenkiste, Arne, Van Waeyenberge, Bartel
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.88.054427
Popis:	We report a numerical implementation of the Landau-Lifshitz-Baryakhtar theory, which dictates that the micromagnetic relaxation term obeys the symmetry of the magnetic crystal, i. e. replacing the single intrinsic damping constant with a tensor of corresponding symmetry. The effect of anisotropic relaxation is studied in thin saturated ferromagnetic disk and ellipse with and without uniaxial magneto-crystalline anisotropy. We investigate the angular dependency of the linewidth of magnonic resonances with respect to the given structure of the relaxation tensor. The simulations suggest that the anisotropy of the magnonic linewidth is determined by only two factors: the projection of the relaxation tensor onto the plane of precession and the ellipticity of the later. Comment: 6 pages, 5 figures, submitted to PRB Rapid. Comm
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1305.1641 Zobrazit plný text záznamu View this record from Arxiv