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The Simulation and Interpretation of the EPR Powder Spectra of Gd 3+ ‐Doped LaAlO 3
Author(s) -
Koopmans H. J. A.,
Perik M. M. A.,
Nieuwennuijse B.,
Gellings P. J.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221220137
Subject(s) - isostructural , electron paramagnetic resonance , spectral line , doping , laser linewidth , ion , condensed matter physics , single crystal , materials science , hamiltonian (control theory) , chemistry , crystallography , crystal structure , physics , nuclear magnetic resonance , quantum mechanics , mathematics , mathematical optimization , laser
The EPR powder spectra of Gd 3+ doped LaAlO 3 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 Gd 3+ ion does not fit within the LaAlO 3 lattice, because GdAlO 3 is not isostructural with LaAlO 3 . Crystal field calculations support this assumption.