Spin – orbit coupling and quasi – nephelauxetic effect in Ce3

A quasi-nephelauxetic effect has been found in Ce3+ ions in different crystal matrices by employing spin-orbit interaction for the ground level 2F5/2. The corresponding matrix elements have been determined and normalized relative to the free ion Ce IV- value. These ratios as a function of the crysta...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2020-02, Vol.579, p.411912, Article 411912
Main Authors: Petrov, Dimitar N., Angelov, B.M.
Format: Article
Language:English
Subjects:
Cerium
Cerium (3+)
Crystal field strength
Crystal structure
Crystals
Field strength
Ground level
Ligands
Nephelauxetic effect
Spin-orbit coupling
Spin-orbit interactions
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Summary:A quasi-nephelauxetic effect has been found in Ce3+ ions in different crystal matrices by employing spin-orbit interaction for the ground level 2F5/2. The corresponding matrix elements have been determined and normalized relative to the free ion Ce IV- value. These ratios as a function of the crystal field strength Nv exhibit a distinct depression below the free-ion limit. Relationships have been depicted between the number nP of crystal-field parameters employed or the maximum splitting of 2F5/2, on one side, and the crystal field strength, on the other. Examples have been presented with a number of crystals containing Ce3+ ions with different symmetry sites and ligands.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2019.411912