Local distortions and spin parameters of Gd³⁺ in some orthorhombic CaF₂ complexes

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Abstract

The ionic positions of Gd³⁺ at orthorhombic sites in CaF₂ with a nearby charge-compensating M⁺ ion (M=Li, Na, K, Rb and Cs) are calculated from a reliable lattice relaxation model. The results are then employed in superposition model analyses of the corresponding spin parameters of the ground state 4f⁷ ⁸S7/2 splitting of the Gd³⁺ ion available in the literature. The superposition model analyses indicate that the spin parameters can best be described in terms of some intrinsic parameters which follow a parabolic dependence on the ligand distances in addition to the conventional power-law form, and hence also assert the cancelling nature of various physical mechanisms contributing to the ground state splitting of Gd³⁺. Copyright © 1992 IOP Publishing Ltd.
Original languageEnglish
Pages (from-to)9741-9750
JournalJournal of Physics: Condensed Matter
Volume4
Issue number48
DOIs
Publication statusPublished - 1992

Citation

Yeung, Y. Y. (1992). Local distortions and spin parameters of Gd³⁺ in some orthorhombic CaF₂ complexes. Journal of Physics: Condensed Matter, 4(48), 9741-9750. doi: 10.1088/0953-8984/4/48/026

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