Repositorio Atenea de la Facultad de Ciencias, UNAM >
Repositorio Ciencias >
FACULTAD DE CIENCIAS >
Ciencias >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/1976
|
Title: | Diffuse phase transition in the (La0.03Sr0.255Ba0.7)(Nb2-yTiy)O-6.y/2 ferroelectric ceramic system |
Authors: | Amorin, H Portelles, J Guerrero, F Fundora, A Siqueiros-Beltrones, JM |
Issue Date: | 2000 |
Abstract: | The effect of the titanium cation as a doping element in the diffuse phase transition of the (Sr0.255La0.03Ba0.7)(Nb2-yTiy)O6-y/2 ferroelectric ceramic system is studied. Far from the transition temperature, a Curie-Weiss behavior of the dielectric permittivity with temperature is observed with strongly broadened curves in all cases, however, a non Curie-Weiss behavior above the transition temperature is observed. The diffuseness coefficient (delta) was calculated using Isupov's relation and by a more realistic model assuming a Gaussian distribution for the transition temperatures, in a temperature interval around the maximum permittivity temperature. The conditions under which each expression can be used are discussed. |
URI: | http://hdl.handle.net/11154/1976 |
ISSN: | 0015-0193 |
Appears in Collections: | Ciencias
|
Files in This Item:
There are no files associated with this item.
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|