Calculations of three-dimensional magnetic excitations in permalloy nanostructures with vortex state
作者： Bin Zhang , Weiwei Wang , Congpu Mu , Qingfang Liu , Jianbo Wang
DOI: 10.1016/J.JMMM.2010.03.002
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摘要: Abstract Dynamic susceptibility spectra of the vortex state in nanorings and nanodots are studied using three-dimensional micromagnetic simulations. Spatial maps have enabled identification various resonance modes. For an exciting field along x axis, several peaks appear for a thin dot, including core mode, whereas only one main peak is detected ring corresponding to volume mode with uniform magnetization perpendicular ( direction). A low-frequency related surface high-frequency viewed as edge additionally observed thick ring. These three modes (surface, modes) which correspond low, intermediate peaks, respectively, also captured y axis. In addition, mixed revealed at higher frequency.
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