Static and dynamic properties of vortices in anisotropic magnetic disks

Details Static and dynamic properties of vortices in anisotropic magnetic disks Static and dynamic properties of vortices in anisotropic magnetic disks

2008-07-28

arxiv.org/abs/0807.4546v1

Appl. Phys. Lett. 93, 112507 (2008)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1063/1.2985901

We investigate the effect of the magnetic anisotropy ($K_z$) on the static and dynamic properties of magnetic vortices in small disks. Our micromagnetic calculations reveal that for a range of $K_z$ there is an enlargement of the vortex core. We analyze the influence of $K_z$ on the dynamics of the vortex core magnetization reversal under the excitation of a pulsed field. The presence of $K_z$, which leads 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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