Magnetic circular dichroism in X-ray fluorescence of Heusler alloys at threshold excitation
Autor(en): | Yablonskikh, MV Grebennikov, VI Yarmoshenko, YM Kurmaev, EZ Butorin, SM Duda, LC Sathe, C Kaambre, T Magnuson, M Nordgren, J Plogmann, S Neumann, M |
Stichwörter: | CO; electronic states (localized); EMISSION-SPECTROSCOPY; FE; INELASTIC-SCATTERING; magnetically ordered materials; MOMENTS; NI; Physics; Physics, Condensed Matter; recombination and trapping; synchrotron radiation; X-ray emission | Erscheinungsdatum: | 2000 | Herausgeber: | PERGAMON-ELSEVIER SCIENCE LTD | Journal: | SOLID STATE COMMUNICATIONS | Volumen: | 117 | Ausgabe: | 2 | Startseite: | 79 | Seitenende: | 82 | Zusammenfassung: | 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 attributed to a peculiarity of the threshold excitation in materials with a half-metallic character of the electronic structure. The excitation energy dependence of Mn L2,3 X-ray emission spectra (XES) was measured at beamline ID12B at the European Synchrotron Radiation Facility (ESRF, Grenoble) using 83% circularly polarized X-rays. A very large MCD effect found in XES is attributed to strong exchange splitting of spin-up and spin-down Mn 3d states. The anomalously high ratio of L-2 emission intensity to L-3 emission intensity is found. (C) 2000 Elsevier Science Ltd. All rights reserved. |
ISSN: | 00381098 | DOI: | 10.1016/S0038-1098(00)00415-4 |
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geprüft am 18.05.2024