Magnetic circular dichroism in X-ray fluorescence of Heusler alloys at threshold excitation
M. V. Yablonskikh, A. V. Ezhov, V. I. Grebennikov, Yu. M. Yarmoshenko, E. Z. Kurmaev, S. M. Butorin, L. -C. Duda, C. Sothe, T. Kaambre, M. Magnuson, J. Nordgren, S. Plogmann, M. Neumann
Abstract
The results of fluorescence measurements of magnetic circular dichroism (MCD) in Mn L2,L3 X-ray emission and absorption for Heusler alloys NiMnSb and Co2MnSb are presented. Very intense resonance Mn L3 emission is found at the Mn 2p3/2 threshold and is attributed to a peculiarity of the threshold excitation in materials with the half-metallic character of the electronic structure. A theoretical model for the description of resonance scattering of polarized x-rays is suggested.
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