Absorption spectra, energy levels, and crystal-field analysis of trivalent neodymium in the γ phase of neodymium sesquisulfide (γ-Nd2S3)
- 15 August 1983
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 79 (4), 1664-1668
- https://doi.org/10.1063/1.446010
Abstract
We report absorption spectra of Nd3+ in the γ phase of Nd2S3. Energy levels of all manifolds from the ground state (4I9/2) through 2H11/2 (15 616 cm−1) were determined from the spectra. A best least‐squares fit of the experimental levels was made with a crystal‐field Hamiltonian of S4 symmetry, resulting in the following crystal‐field parameters Bkm (in cm−1): B20=−209, B40=402, B44=1236, B60=−774, RB64=−423, and IB64=103. The rms deviation between calculated and experimental levels is 8.7 cm−1. A total of 50 levels was included in the fit (out of a possible 53 within the manifolds considered). The results are shown to be consistent with an effective point‐charge model for the γ‐Nd2S3 lattice in which Nd3+ vacancies are distributed randomly.Keywords
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