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Analysis of the crystal field in rare-earth substituted oxysulphide and vanadate systems

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
32
Issue
3
Identifiers
DOI: 10.1016/0022-3697(71)90002-3

Abstract

Abstract Superposition model parameters are derived for various ion pair systems (notably Eu 3+ O 2−, Eu 3+ S 2−, Er 3+ O 2−) from experimental crystal field parameters for two series of rare-earth substituted systems: Eu 3+: R 2O 2S (R = La, Gd, Y, Lu), and Er 3+: YMO 4 (M = P, V, As), ScVO 4. Previous derivations of intrinsic parameters are corrected and extended, thus increasing the volume and accuracy of data suitable for comparison with ab initio calculations. The distance dependence of Eu 3+ O 2− parameters has been estimated (from trends in the oxysulphide series) to be relatively large ( t n ≈ 7–10 ) in agreement with our analysis of the crystal field in substituted garnets.

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