Concentric domains in patterned thin films with perpendicular magnetic anisotropy
für Mikrostrukturphysik - Weinberg 2, 06120 Halle, Germany
Accepted: 13 October 2003
We report a finite-element micromagnetic study on domain structures in tetragonally distorted films which are confined to the geometric shapes of a cylindrical disc, rectangular and triangular prisms, and a pacman. The thickness-dependent perpendicular anisotropy is provided by the inverse magnetostriction effect. It is found that some of the observed perpendicular domain patterns reflect the in-plane shape of their respective element. We call these domains “concentric domains”. The geometric effect on the domain shape is attributed to the inhomogeneity of the demagnetizing field.
PACS: 75.70.Kw – Domain structure (including magnetic bubbles) / 75.75.+a – Magnetic properties of nanostructures / 02.70.Dh – Finite-element and Galerkin methods
© EDP Sciences, 2003