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EPR and luminescence of Mn 2+ in distorted tetrahedral symmetry in CaZnF 4 crystals
Author(s) -
Heming M.,
Lehmann G.,
Recker K.,
Wallrafen F.
Publication year - 1983
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.2221170129
Subject(s) - luminescence , hyperfine structure , electron paramagnetic resonance , crystallography , zero field splitting , tetrahedral symmetry , annealing (glass) , scheelite , materials science , condensed matter physics , chemistry , analytical chemistry (journal) , nuclear magnetic resonance , atomic physics , physics , electron , optoelectronics , chromatography , composite material , metallurgy , rotational symmetry , quantum mechanics , mechanics , tungsten , spin polarization
Small crystals of CaZnF 4 with scheelite‐type structure, doped with about 1% Mn are obtained from the melt by the Bridgman method with subsequent annealing at 725 °C, 50 K below a reversible phase transformation detected by DTA. Mn 2+ exclusively occupies Zn sites as evident from the size of the hyperfine splitting constant. The intrinsic zero field splitting parameter of second order obtained from superposition analysis is in the same range as that for [MnF 6 ] 4− units. The luminescence spectra do not serve as a critical test for distinction between four‐ and eightfold coordination.