A SIMPLE APPROACH TO INTERPRET ELECTRICAL AND STRUCTURAL PROPERTIES OF SOL GEL PROCESSED PLT CERAMICS

 

K. Limame1, S. Sayouri1*, A. Housni1, R. Essehli2, B. Jaber3

1 Laboratoire de Physique Théorique et Appliquée, Faculté des Sciences Dhar Mehraz, B.P.1796,Fes Atlas,Morocco.

2 L.I.M.O.M Faculté des Sciences Dhar Mehraz, B.P.1796,Fes Atlas,Morocco.

3CNRST 52 Av Omar Iben Alkhattab Agdal Rabat Morocco

* Corresponding author. E-mail:ssayouri@yahoo.com

Received: 06 February 2006; revised version accepted:05 February 2007

 

Abstract

     Effect of lanthanum doping in sol gel processed PLT samples is investigated with the help of an analytical approach involving simple considerations of interacting dipoles, and occupation probabilities of different sites. It is shown that exchange and electrostatic interactions and their behavior, due to the disorder created by La, may explain structural changes in these materials and the decrease of the maximum of the dielectric constant.

 

Keywords: Sol gel; Electrostatic interaction; Debye attraction; Perovskite; Ferroelectric materials.

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