Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Magnetic Materials

MA 28.8: Vortrag

Mittwoch, 13. März 2013, 17:00–17:15, H22

Contributions of domain wall substructures to the magnetization configurations — •Sukhvinder Singh, Haibin Gao, and Uwe Hartmann — Experimental Physics, Saarland University, P O. Box 151150, D-66041, Saarbrücken, Germany

Magnetic domain wall substructures have strong influences on domain wall behavior, i.e., movement and pining effects within an external magnetic field. In this work, contributions of domain wall substructures (Bloch lines, cross-tie wall components, vortex-antivortex pairs) and individual vortices to the magnetization configurations of EBL-patterned Permalloy thin films and Fe-whiskers have been investigated. MFM was employed to check the influence of those substructures' interactions with notches and sample edges with and without an in-plane static magnetic field. The result shows the attractive interaction between magnetic charges at the edge and the vortex-antivortex dipolar charges in the cross-tie wall. Stripe domains were observed for films of more than 100 nm of thickness. In contrast, well arranged stripe domains mixed with Landau domain pattern or cross-tie wall structures were found on thinner samples. OOMMF was used to model the behavior observed by MFM.