Bulk sensitive L2,3 x-ray magnetic circular dichroism spectra were measured in transmission on MnandCo-doped ZnO thin films grown by pulsed laser deposition on soft x-ray transparent siliconnitride membranes. The absorption spectra line shapes support that Mn and Co divalent ionssubstitute Zn ions ruling out the hint of cluster formation. The lack of dichroic signal at the Mn andCo-edges in such bulk sensitive measurements indicates that the ferromagnetism witnessed byvibrating sample magnetometry measurements could arise from delocalized magnetic moments, dueto itinerant electrons associated with defects.
Bulk sensitive x-ray absorption and magnetic circular dichroism investigation of Mn- and Co-doped ZnO thin films
Di Trolio A.;Larciprete R.;Turchini S.;Zema N.
2010
Abstract
Bulk sensitive L2,3 x-ray magnetic circular dichroism spectra were measured in transmission on MnandCo-doped ZnO thin films grown by pulsed laser deposition on soft x-ray transparent siliconnitride membranes. The absorption spectra line shapes support that Mn and Co divalent ionssubstitute Zn ions ruling out the hint of cluster formation. The lack of dichroic signal at the Mn andCo-edges in such bulk sensitive measurements indicates that the ferromagnetism witnessed byvibrating sample magnetometry measurements could arise from delocalized magnetic moments, dueto itinerant electrons associated with defects.File in questo prodotto:
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Descrizione: Bulk sensitive x-ray absorption and magnetic circular dichroism investigation of Mn- and Co-doped ZnO thin films
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