Author/Authors :
Yablonskikh، نويسنده , , M.V and Grebennikov، نويسنده , , V.I and Yarmoshenko، نويسنده , , Yu.M and Kurmaev، نويسنده , , E.Z and Butorin، نويسنده , , S.M and Duda، نويسنده , , L.-C and S?the، نويسنده , , C and K??mbre، نويسنده , , T and Magnuson، نويسنده , , M and Nordgren، نويسنده , , J and Plogmann، نويسنده , , S and Neumann، نويسنده , , M، نويسنده ,
Abstract :
The results of fluorescence measurements of magnetic circular dichroism (MCD) in Mn L2,3 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 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 L2 emission intensity to L3 emission intensity is found.
Keywords :
E. X-ray emission , A. Magnetically ordered materials , D. Electronic states (localized) , D. Recombination and trapping , E. Synchrotron radiation
