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
Enthalten in: SOLID STATE COMMUNICATIONS
Band: 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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