Regensburg 2016 – scientific programme
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.15: Poster
Tuesday, March 8, 2016, 09:30–12:30, Poster B1
Control of the Magnetic Structure of [Co/Pd] and TbFe Thin Films by Direct Laser Interference Patterning — •Philipp Graus1, Martin Stärk1, Frank Schlickeiser1, Dennis Nissen2, Birgitt Hebler2, Elke Scheer1, Paul Leiderer1, Manfred Albrecht2, Mikhail Fonin1, and Johannes Boneberg1 — 1Universität Konstanz — 2Universität Augsburg
Pulsed two beam direct laser interference patterning (DLIP) is used to generate two dimensional temperature patterns on a magnetic sample. In contrast to other methods like electron beam lithography, DLIP offers the possibility to pattern large areas on a timescale of a few nanoseconds in a one-step process. Usually DLIP is used to pattern surfaces, but here we focus on local periodic heating on the nanoscale. We investigate the effect of heat on thin magnetic Co/Pd multilayer systems and TbFe alloys which offer a strong perpendicular anisotropy. We compare results from experiments from 55 µm interference period down to 500 nm period. For both types of materials three different magnetic regions arise. These regions can be assigned to defined temperatures. In the case of Co/Pd the temperature gives rise to a intermixing process of the former separated multilayer system. For TbFe a phase transition from amorphous to polycrystalline takes place. These findings have been confirmed by numeric simulations using the Landau-Lifshitz-Bloch (LLB) formalism.