Static and dynamic properties of vortices in anisotropic magnetic disks

Machado, Tiago S.; Rappoport, Tatiana G.; Sampaio, Luiz C.
September 2008
Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p112507
Academic Journal
We investigate the effect of the magnetic anisotropy (Kz) on the static and dynamic properties of magnetic vortices in small disks. Our micromagnetic calculations reveal that for a range of Kz there is an enlargement of the vortex core. We analyze the influence of Kz on the dynamics of the vortex core magnetization reversal under the excitation of a pulsed field. The presence of Kz, which lead to better resolved vortex structures, allows us to discuss in more details the role played by the in-plane and perpendicular components of the gyrotropic field during the vortex-antivortex nucleation and annihilation.


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