Coupling between spin and orbital degrees of freedom in KCuF3 |
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Authors: | Paolasini L Caciuffo R Sollier A Ghigna P Altarelli M |
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Institution: | European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France. |
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Abstract: | 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. The results give evidence for a strong coupling between orbital and spin degrees of freedom. The interplay between magnetic and orbital order parameters is revealed by the temperature dependence of the intensity of orbital Bragg peaks. |
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