Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 39: Micro- and Nanostructured Magnetic Materials I
MA 39.12: Vortrag
Donnerstag, 29. März 2012, 12:30–12:45, EB 202
Magnetic reversal in a laterally structured spin valve system with one tunable magnetic layer — •Frank Brüssing, Melanie Ewerlin, Radu Abrudan, and Hartmut Zabel — Department of Physics, Ruhr-University Bochum, 44780 Bochum, Germany
We investigated the magnetization reversal of interacting Co islands and how their behavior is altered after switching on the interlayer exchange interaction to a second magnetic island with different magnetic domain structure and different coercivity values. We prepared an epitaxial magnetic heterostructure comprising two ferromagnetic layers, one with a high Curie temperature (TC) (Co) and one with a TC below room temperature (RT) (Fe1−xCrx), and a mediating Cr layer in between. After lateral patterning via e-beam lithography and ion beam etching into islands, we investigated elements selectively the magnetization reversal of Co at RT and of the combined system at low temperature, using x-ray resonant magnetic scattering (XRMS). As reference we also investigated the same heterostructure before patterning. The lateral periodic pattern gives raise to new in-plane Bragg reflections, revealing the structural and magnetic intra- and inter-island correlation. For the measurments we have used a CCD camera for investigating the magnetic Bragg peaks and magnetic diffuse scattering as a function of temperature above and below the TC of Fe1−xCrx.