Resonant x-ray scattering study of magnetic and orbital order in KCuF3

R. Caciuffo, L. Paolasini, A. Sollier, P. Ghigna, E. Pavarini, J. van den Brink, M. Altarelli

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We present the results of resonant x-ray scattering experiments on KCuF3. Structurally forbidden reflections, corresponding to magnetic and 3d-orbital long-range order, have been observed. Integrated intensities have been measured as a function of incident energy, polarization, azimuthal angle, and temperature. By means of ab initio local spin density approximation (LSDA) and local spin density approximation with on-site Coulomb interaction (LSDA+U) calculations we determine the electronic structure of KCuF3 and obtain the resonant x-ray scattering spectrum at the Cu K edge, which shows good agreement with the experimental data. Orbital and spin degrees of freedom are strongly coupled, and the temperature dependence of the intensity of orbital Bragg peaks reveals a correlation between magnetic and orbital order parameters.
Original languageUndefined
Pages (from-to)174425/1-174425/9
Number of pages9
JournalPhysical review B: Condensed matter and materials physics
Issue number17
Publication statusPublished - 2002


  • IR-37932
  • METIS-205993

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