Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 12: Poster 1
DF 12.35: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Quadratic magnetooptical effects in two-dimensional permalloy particles investigated by scanning X-ray microscopy — •S.A. Nepijko1, O.V. Pylypenko2, L.V. Odnodvorets2, E. Kisker3, H.J. Elmers1, and G. Schönhense1 — 1Institute of Physics, University of Mainz, Staudingerweg 7, 55128 Mainz, Germany — 2Sumy State University, Rimsky-Korsakov str. 2, 40007 Sumy, Ukraine — 3Institute of Applied Physics, University of Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
We have investigated the magnetization structure and magnetization curves of individual rectangularity shaped permalloy particles using scanning X-ray microscopy in the ultrasoft X-ray regime. Magnetic contrast originates from M-edge X-ray magnetic circular dichroism and from the transverse magnetooptical Kerr effect [1, 2]. We studied magnetization curves in dependence on the field direction for particles of different shapes and sizes. Adjacent particles cause a significant dipole interaction. Asymmetric magnetization loops indicate the presence of non-linear magnetooptical effects. [1] M. Schroeder et al., Nucl. Instrum. Methods Phys. Res., Sect. A, 467-468 (2001) 1404; [2] S.A. Nepijko et al., APA, published online: 19 Sept. 2012