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Low-frequency vortex dynamic susceptibility and relaxation in mesoscopic ferromagnetic dots

Low-frequency vortex dynamic susceptibility and relaxation in mesoscopic ferromagnetic dots

Vortex dynamics in a restricted geometry is considered for a magnetic system consisting of ferromagnetic cylindrical dots. To describe the vortex dynamic susceptibility and relaxation the equation of motion for the vortex center position is applied. The dependencies of the vortex dynamic susceptibility and resonance linewidth on geometrical parameters are …