Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MA: Magnetismus

MA 10: Micromagnetism / Computational Magnetism

MA 10.1: Vortrag

Montag, 27. März 2006, 17:00–17:15, HSZ 401

Simulation of vortex structures in Permalloy, Fe and Co nanoparticles — •Sebastian Macke, Dagmar Goll, and Gisela Schütz — MPI für Metallforschung, Stuttgart

Recently, magnetic vortex structures have attracted much attention because of their influences on magnetization processes in nanostructures as used in data storage and spintronics.

By the methods of computational micromagnetism based on the finite element method the distribution of magnetization within a vortex in small square particles of permalloy, iron and cobalt has been studied systematically.

The magnetization distribution within the vortex and the vortex energy sensitively depend on the dimensions and the material parameters of the particles. It is shown that there exists a periodic fluctuation of the out-of-plane magnetization due to the dipolar interactions and the vortex contracts at the surfaces in the case of thicker films. The results are compared with analytical approaches.

Finally the interactions between vortices in rectangular nanodots and patterns of nanodots are investigated.