Abstract
Faculty of Physics, A. Mickiewicz University in Pozna«, Umultowska 85, 61-614 Pozna«, Poland We use a microscopic theory taking into account the nearest-neighbour exchange and dipolar interactions to study two-dimensional magnetic nanodots and nanorings. Magnetic con guration is assumed to form an inplane vortex (circular magnetization). We examine the dependence of the frequencies and pro les of spin waves on the dipolar-to-exchange interaction ratio d and the size of the dot (ring). Special attention is paid to some particular modes, including the lowest mode in the spectrum and the fundamental mode, the frequency of which proves almost independent of d. In the case of the lowest mode di erent pro les are observed: azimuthal, fundamental (quasiuniform) or highly localized, depending on d and the size. We also study the fundamental mode evolution including its hybridization and explain the selection rules. DOI: 10.12693/APhysPolA.127.365
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