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Sökning: WFRF:(HRICOVINI K) > (2005-2009)

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1.
  • Richter, M. C., et al. (författare)
  • NiFe2O4 and Fe3O4 studied by XMCD and resonant photoemission
  • 2009
  • Ingår i: The European Physical Journal. Special Topics. - : Springer Science and Business Media LLC. - 1951-6355 .- 1951-6401. ; 169, s. 175-180
  • Tidskriftsartikel (refereegranskat)abstract
    • X-ray magnetic circular dichroism and resonant photoemission at the Fe and Ni L-2,L-3 edges have been used to investigate the electronic structure of NiFe2O4 (NFO) thin films. The results, when compared to those obtained on Fe3O4, indicate that in a 12 nm NFO film the Ni atoms occupy mainly B sites, as in bulk NFO, and that a decrease in the thickness of the film results in a modi. cation of the nickel hybridization.
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2.
  • Richter, MC, et al. (författare)
  • Resonant photoemission at the 2p edge in compounds containing Mn with different valences
  • 2006
  • Ingår i: Synchrotron Radiation and Materials Science - Proceedings of the E-MRS 2005 Symposium O on Synchrotron Radiation and Materials Science (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms). - : Elsevier BV. - 0168-583X. ; 246:1, s. 184-188
  • Konferensbidrag (refereegranskat)abstract
    • We have investigated the Raman-Auger crossover of the Mn 2p non-radiative decays in bulk MnO. For the highest kinetic energy transition in the Mn 2p3p3p decay, Raman behaviour is observed up to approximate to 3.4 eV above the resonance energy (maximum of the L-3 absorption). In the case of the 2p3p3d and 2p3d3d transitions a similar situation occurs up to approximate to 5 eV above the resonance energy. We compare these results to those obtained on a thin MnO layer deposited on Cu, on bulk Mn and on La0.7Sr0.3MnO3. The results are discussed in terms of the screening dynamics of the Mn 2p core hole and of the metallic/insulating character of the material. (c) 2005 Elsevier B.V. All rights reserved.
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