Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.56: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

Spin-reorientation transition and domain structure in Ni_xPd_1−x alloys — •Daniel Gottlob^1,2, Ingo Krug¹, Hatice Doğanay¹, Florian Nickel¹, Stefan Cramm¹, and Claus Schneider^1,2 — ¹Forschungszentrum Juelich, 52425 Juelich — ²Fakultaet fuer Physik, Universitaet Duisburg-Essen, 47057 Duisburg

We chose the model system Ni_xPd_1−x to investigate different mechanisms involved in (inverse) spin-reorientation transitions (iSRTs). The 3d-4d hybridization between Ni and Pd and the strain variation by composition offer a way to tune the magnetic anisotropy. Aberration-corrected LEEM-PEEM with its high spatial resolution is the ideal tool to investigate the magnetic domain-structure and do composition-gradient dependent studies on microwedges and thin films. By alloying Palladium into Nickel the epitaxial strain of a thin film may be varied and the critical film thickness at which an (i) SRT occurs can be controlled. We prepared microwedged and continuous NiPd thin films in situ by molecular beam epitaxy. Both elements have been co-deposited using an aperture-shadowing technique to create a thickness wedge on the sample. We present a study by aberration corrected LEEM-PEEM at the FZ Jülich Beamline UE56/1-sgm at BESSY, mapping the SRTs and magnetic phases via the domain structures of NiPd alloy films between 10 and 100 monolayers.