J. Phys. I France
Volume 3, Numéro 9, September 1993
Page(s) 1973 - 1983
DOI: 10.1051/jp1:1993225
J. Phys. I France 3 (1993) 1973-1983

Jahn-Teller effect in V 4+ doped Gd 3Ga 5O 12 garnet

M. Grinberg1, A. Brenier2, G. Boulon2, C. Pedrini2, C. Madej2 and A. Suchocki3

1  Institute of Physics, N. Copernicus University, Grudziadzka 5/7, 87-100 Torun, Poland
2  Laboratoire de Physico-Chimie des Matériaux Luminescents, (Unité de recherche associée au CNRS n$^{\circ}$ 442), Université Claude Bernard-Lyon I, 43 Bd 11 Novembre 1918, 69622 Villeurbanne Cedex, France
3  Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warszawa, Poland

(Received 28 December 1992, revised 7 May 1993, accepted 19 May 1993)

We consider the static and dynamic $\rm E \,\,* \in$ and $\rm T \,\,* \in$ Jahn-Teller effects in order to analyze the absorption and emission spectra of octahedrally coordinated V 4+ and absorption of tetrahedrally coordinated V 4+. Using two-dimensional configuration coordinate diagrams of octahedrally and tetrahedrally coordinated V 4+ we are able to explain the structure of the emission and absorption spectra and the fluorescence kinetics measurements of V 4+ doped GGG. Our calculations support the assumption that V 4+ in tetrahedral sites is responsible for the additional absorption band in the red region.

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