Eur. Phys. J. AP
Volume 12, Number 2, November 2000
|Page(s)||79 - 83|
|Published online||15 November 2000|
Interstitial-fluoride and substitutional-oxygen charge compensations of Er3+ doped in CaF2 crystal
Groupe de Physique Théorique, Département de Physique, Faculté des
Sciences de Sfax, 3018 Sfax, Tunisia
2 LEMME, Université de Bordeaux 1, 351 cours de la Libération, 33405 Talence Cedex, France
Corresponding author: email@example.com
Revised: 21 July 2000
Accepted: 22 August 2000
Published online: 15 November 2000
A detailed crystal-field analysis, based on the Racah' theory, was carried out for the so-called A, B and G1 isolated charge-compensation centers of Er3+ ion doped in CaF2 crystal. Three sets of crystal-field parameters were obtained by a least-squares fitting of the optical data of Er3+ ion diluted in epitaxial Ca1−xErxF2+x thin film. This theoretical analysis confirms the expected site symmetry for the A center and the site symmetry for the G1 center. For the B center, however, the site symmetry is not exactly in contrast to what is believed.
PACS: 71.70.Ch – Crystal and ligand fields / 78.20.-e – Optical properties of bulk materials and thin films / 78.20.Bh – Theory, models, and numerical simulation
© EDP Sciences, 2000
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