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 and, E.Z. Kurmaev (address Institute of Metal Physics, Russian Academy of, Sciences-Ural Division, Yekaterinburg, Russia) S.M. Butorin, L.-C. Duda, C., Sothe, T. Kaambre, M. Magnuson
TL;DR
This study investigates magnetic circular dichroism in X-ray fluorescence of Heusler alloys at threshold excitation, revealing intense resonance emissions linked to their half-metallic electronic structure and proposing a theoretical model for resonance scattering.
Contribution
It provides new experimental data on MCD in Heusler alloys and introduces a theoretical model for resonance scattering of polarized X-rays.
Findings
Intense resonance Mn L3 emission at the Mn 2p3/2 threshold
Resonance linked to half-metallic electronic structure
Proposed theoretical model for resonance scattering
Abstract
The results of fluorescence measurements of magnetic circular dichroism (MCD) in Mn L_2,L_3 X-ray emission and absorption for Heusler alloys NiMnSb and Co2MnSb are presented. Very intense resonance Mn L_3 emission is found at the Mn 2p_3/2 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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