Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Magnetic Materials
MA 28.3: Vortrag
Mittwoch, 13. März 2013, 15:30–15:45, H22
Calculation of the angular dependence of XMLD in reflection in 3d transition metals at 3p edges — •Dominik Legut1, Peter Oppeneer2, Marc Tesch3, Hans-Christoph Mertins3, Markus Gilbert3, and Andreas Gaupp4 — 1Nanotechnology Centre, Ostrava, Czech Republic — 2Department of Physics and Astronomy, Uppsala, Sweden — 3FH Münster, Steinfurt, Germany — 4HZB, Berlin, Germany
The full angular dependence of the x-ray magnetic linear dichroism
(XMLD) in reflection spectra on the crystalline orientation of the magnetization was
investigated for ferromagnetic bcc Fe, fcc Ni and fcc Co. The anisotropic XMLD spectra were computed in the single electron picture within the framework of the DFT. The excitation stemming from semicore 3p levels were considered. The calculated results show similarities as well as differences between L2,3 and M2,3 edges, because of hybridization of two 3p1/2 sub-levels and four 3p3/2 sub-levels (mj levels).1
The XMLD signal is strongly dependent on the magnetization direction with respect to the crystal axes. Furthermore, the influence of the sample thickness on the reflection coefficients is investigated. The magnitude of the lattice distortion vs. the influence of the spin-orbit coupling on the reflection coefficients for general magnetization direction is revealed. The calculated data show very good agreement with recently recorded spectra of bcc Fe. The influence of the spin-orbit coupling and exchange interaction at 3p states is revealed.
References:
1. S. Valencia et al.,Phys. Rev. Lett. 104, 187401 (2010).