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Ferroelectrics Volume 337, 2006 - Issue 1
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SECTION K: PHASE TRANSITIONS AND CRITICAL PHENOMENA

Optical Properties of Active Ions Around the Ferro-Paraelectric Phase Transition in SBN Crystals

M. O. Ramírez Departamento de Física de Materiales, C-IV, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
,
D. Jaque Departamento de Física de Materiales, C-IV, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
,
L. E. Bausá Departamento de Física de Materiales, C-IV, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
,
J. García Solé Departamento de Física de Materiales, C-IV, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
,
A. Speghini Dipartimento Científico e Tecnológico, University of Verona and INSTM, UdR Verona, Ca'Vignal, Strada Le Grazie 15, Verona, 37134, Italy
&
M. Bettinelli Dipartimento Científico e Tecnológico, University of Verona and INSTM, UdR Verona, Ca'Vignal, Strada Le Grazie 15, Verona, 37134, Italy
Pages 33-39 | Received 26 Jan 2006, Published online: 09 Mar 2011
 
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New results on the evolution of the emission of Nd 3+ doped Sr x Ba 1− x Nb 2 O 5 crystal during the ferroelectric phase transition are presented and compared to those previously obtained for Cr 3+ and Yb 3+ doped Sr x Ba 1− x Nb 2 O 5 . We have observed that Nd 3+ emission is insensitive to the structural changes suffered by the crystal during the phase transition, contrary to the observations obtained for the cases of the Cr 3+ and Yb 3+ doped crystals. The results are interpreted in terms of the different lattice sites occupied by the optically active ions in the Sr x Ba 1− x Nb 2 O 5 crystal.

Acknowledgments

Paper originally presented at IMF-11, Iguassu Falls, Brazil, September 5–9, 2005; received for publication January 26, 2006.

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