Add time:07/19/2019         Source:sciencedirect.com

Gadolinium (Gd3+) in Czochralski-grown lutetium fluoride (LuF3) has been investigated by electron paramagnetic resonance (EPR). Detailed analysis of the EPR angular dependencies reveals that Gd3+ entered substitutionally for Lu3+ in monoclinic Cs site symmetry. The Lu site seems to be more distorted by the Gd ion as compared to the Y site in YF3. The zero-field splitting of the ground state b20 is −1.8372 GHz which is more than twice compared to that of Gd3+ in host crystals of LaF3, in which gadolinium has the same co-ordination number. The results of the fine structure analysis are compared to a similar study in the iso-structural host YF3. The obtained results seem to be in contrast to the superposition model.

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