TY - JOUR
T1 - The Interpretation of Broadened Gd3+ EPR Spectra of Polycrystalline Ceramics
AU - Koopmans, H.J.A.
AU - Perik, M.M.A.
AU - Nieuwenhuijse, B.
AU - Gellings, P.J.
PY - 1983
Y1 - 1983
N2 - An interpretation is given of the broadened EPR spectra of Gd3+ ions, which are frequently observed in polycrystalline ceramics and glasses. A reasonable simulation of the spectra is obtained, when these are regarded as a superposition of a large number of normal EPR powder spectra, each of which can be described with the usual spin-Hamitonian. These originate from the many different surroundings of the Gd3+ ions in these compounds due to the structural disorder. The result is, that only those transitions, which are independent of the zero field splitting parameters in the spin Hamiltonian, remain visible in the derivative spectrum. The interpretation is supported by the EPR powder spectrum of the Gd3+ doped compound CaHf4O9, which changes from broadened into clearly resolved, when the compound is ordered by an annealing process.
AB - An interpretation is given of the broadened EPR spectra of Gd3+ ions, which are frequently observed in polycrystalline ceramics and glasses. A reasonable simulation of the spectra is obtained, when these are regarded as a superposition of a large number of normal EPR powder spectra, each of which can be described with the usual spin-Hamitonian. These originate from the many different surroundings of the Gd3+ ions in these compounds due to the structural disorder. The result is, that only those transitions, which are independent of the zero field splitting parameters in the spin Hamiltonian, remain visible in the derivative spectrum. The interpretation is supported by the EPR powder spectrum of the Gd3+ doped compound CaHf4O9, which changes from broadened into clearly resolved, when the compound is ordered by an annealing process.
KW - IR-70714
U2 - 10.1002/pssb.2221200234
DO - 10.1002/pssb.2221200234
M3 - Article
SN - 0370-1972
VL - 120
SP - 745
EP - 751
JO - Physica Status Solidi. B: Basic Research
JF - Physica Status Solidi. B: Basic Research
IS - 2
ER -