Localized domain-wall excitations in patterned magnetic dots probed by broadband ferromagnetic resonance
Title (trans.)American Physical Society
EntityUAM. Departamento de Física de la Materia Condensada
10.1103/PhysRevB.84.144406Physycal Review B 84.14 (2011): 144406
Funded byThis paper was supported by Spanish MICINN (MAT2009-10139, Consolider CSD2007-00010), CM(P2009/MAT-1726)and SVORTEX (CCC-UAM) grants. K.G. acknowledges supportby IKERBASQUE (the Basque Foundation for Science)and by the Spanish MICINN grants FIS2010-20979-C02-01and PIB2010US-00153. V.M. acknowledges funding from US NSF, Grant No. ECCS-0823813
ProjectGobierno de España. MAT2009-10139; Gobierno de España. CSD2007-0010; Gobierno de España. FIS2010-20979-C02-01; Gobierno de España. PIB2010US-00153
Rights© 2011 American Physical Society
We investigate the magnetization dynamics in circular Permalloy dots with spatially separated magnetic vortices interconnected by domain walls (double vortex state). We identify a novel type of quasi one-dimensional (1D) localized spin wave modes confined along the domain walls, connecting each of two vortex cores with two edge half-antivortices. Variation of the mode eigenfrequencies with the dot sizes is in quantitative agreement with the developed model, which considers a dipolar origin of the localized 1D spin waves or so-called Winter's magnons. These spin waves are analogous to the displacement waves of strings and could be excited in a wide class of patterned magnetic nanostructures possessing domain walls, namely in triangular, square, circular, or elliptic soft magnetic dots
Google Scholar:Aliev Kazanski, Farkhad - Awad, A. A. - Dieleman, D. - Lara, A. - Metlushko, V. - Guslienko, K. Y.
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