The Simulation and Interpretation of the EPR Powder Spectra of Gd3+-Doped LaAlO3

H.J.A. Koopmans, M.M.A. Perik, B. Nieuwenhuijse, P.J. Gellings

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Abstract

The EPR powder spectra of Gd3+ doped LaAlO3 are simulated for a number of temperatures between 4 and 800 K by means of the usual spin-Hamiltonian. Values are found for the zero field splitting parameters B(n, 0) only, which agree with single crystal measurements. For an accurate simulation of the axial powder spectra a variable linewidth has to be introduced, because an inhomogeneous broadening of the resonances in the xy plane is observed. This broadening is successfully described by a variable B(2, 2) parameter. This indicates that the Gd3+ ion does not fit within the LaAlO3 lattice, because GdAlO3 is not isostructural with LaAlO3. Crystal field calculations support this assumption.
Original languageUndefined
Pages (from-to)317-330
JournalPhysica status solidi B
Volume122
Issue number1
DOIs
Publication statusPublished - 1984

Keywords

  • IR-70715

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