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Ferroelectrics Letters Section Volume 24, 1998 - Issue 5-6
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Original Articles

Evidence for energy migration and transfer in TbTa3O9, EuTa3O9 and Tb0.9Eu0.1Ta3O9 powder samples

E. Alvarez R. Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. BOX 534, 09340, México, D.F., México
,
A. Ibarra-Palos Institute de Investigaciones en Materiales, Universidad Nacional Autónoma de México A.P. 70-360 Ciudad Universitaria, Coyoacan 04510, México, D.F., México
,
M. E. Villafuerte-Castrejon Institute de Investigaciones en Materiales, Universidad Nacional Autónoma de México A.P. 70-360 Ciudad Universitaria, Coyoacan 04510, México, D.F., México
,
U. Caldiño G. Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. BOX 534, 09340, México, D.F., México
,
J. Rubio O. Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. BOX 534, 09340, México, D.F., México
&
A. Muñoz F. Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. BOX 534, 09340, México, D.F., México
Pages 105-117 | Received 01 Jun 1998, Published online: 17 Aug 2006
 
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Abstract

In this paper the optical properties (emission and excitation spectra) of powder samples of the double oxides of RETa3O9 (RE = Tb, Eu) were analyzed. The results of lifetime measurements and time resolved experiments performed at 11 and 300 K are discussed. Within the range of the continuous solid solution Tb1-xEuxTa3O9, the optical characterization of our powder sample Tb0.9Eu0.1Ta3O9 is presented and combined with the previous results obtained by X-ray diffraction techniques to develop a better understanding on the effect of the RE ions on the crystalline structure of our samples.

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