Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Magnetic Thin Films I

MA 46.1: Vortrag

Donnerstag, 19. März 2015, 15:00–15:15, H 1012

Microscopic analysis of the composition driven spin-reorientation transition in Ni_xPd_1−x/Cu(001) — •Daniel M. Gottlob¹, Hatice Doğanay¹, Florian Nickel¹, Stefan Cramm¹, Ingo P. Krug^1,2, Slavomír Nemšák¹, and Claus M. Schneider^1,3 — ¹Peter Grünberg Institut 6, Forschungszentrum Jülich, 52425 Jülich, Germany — ²Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin, Germany — ³Fakultät für Physik and Center for Nanointegration Duisburg-Essen (CeNIDE), Universität Duisburg-Essen, 47048 Duisburg, Germany

The composition driven spin-reorientation transition (SRT) has been investigated in the thin film system Ni_xPd_1−x/Cu(001) by photoemission microscopy (PEEM) utilizing the x-ray magnetic circular dichroisim (XMCD) effect at the Ni L_2,3 edge. The magnetic domain structure and its development has been investigated on microwedges grown in the integrated preparation chamber by molecular beam epitaxy and characterized in-situ. By alloying palladium into nickel the epitaxial strain of a thin film may be varied and the critical film thickness at which an SRT occurs can be controlled. A composition driven SRT could be identified between 37 ML and 60 ML film thickness and 0 to 38 atomic % of Pd. The domain structure in the vicinity of the SRT shows comparable behavior to ultrathin film SRTs, however, additional influences of magnetic in-plane anisotropies could be observed, resulting in a domain alignment along the in-plane easy axis. The SRT is found to take place by a continuous canting of the magnetization axis.