Berlin 2005 – scientific programme

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MA: Magnetismus

MA 32: Mikro- und nanostrukturierte magn. Materialien II

MA 32.7: Talk

Wednesday, March 9, 2005, 12:30–12:45, TU H1028

Magnetic domain walls in T-shaped permalloy microstructures — •Thomas Haug¹, Jörg Raabe², Stefan Heun³, Andrea Locatelli⁴, and Christian H. Back¹ — ¹Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany — ²Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland — ³TASC-INFM Laboratory, 34012 Basovizza, Trieste, Italy — ⁴Elettra Synchrotron Light Source, 34012 Basovizza, Trieste, Italy

The magnetic domain configuration of 20 nm thick T-shaped permalloy structures has been observed using a photo emission electron microscope and X-ray magnetic dichroism. The shape of the structures allows us to analyse 90^∘ Nèel walls in the contact region. We measure the wall width out of the magnetic images and look at its dependence on the contact width. The results are compared to micromagnetic simulations. We find a decrease in domain wall width with decreasing contact dimensions as expected by theory and in good agreement with our micromagnetic simulations.