Title :
Thermally stimulated depolarization current in a modified SBN ferroelectric ceramic system
Author :
Amorin, Harvey ; Venet, Michel ; Guerrero, Fidel ; Fundora, Abel ; Martinez, Eduardo ; Portelles, Jorge ; Siqueiros, Jesus
Author_Institution :
Fac. de Fisica, Habana Univ., La Habana, Cuba
Abstract :
The Thermally Stimulated Depolarization Current (TSDC) of the modified SBN ferroelectric ceramic system was studied. The TSDC measurements show the pyroelectric peak for all compositions while a second smaller peak at higher temperatures, possibly associated to induced vacancy-impurity dipoles is also observed in all cases. The second peak contribution was experimentally and mathematically eliminated. The activation energies and infinite temperature relaxation time of both processes are determined
Keywords :
barium compounds; dielectric depolarisation; dielectric relaxation; ferroelectric ceramics; impurity-vacancy interactions; pyroelectricity; strontium compounds; thermally stimulated currents; SBN; SrxBa1-xNb2O6; SrBaNb2O6; TSDC measurements; activation energies; compositions; induced vacancy-impurity dipoles; infinite temperature relaxation time; modified SBN ferroelectric ceramic system; pyroelectric peak; thermally stimulated depolarization current; Ceramics; Crystalline materials; Doping; Ferroelectric materials; Lanthanum; Niobium compounds; Polarization; Pyroelectricity; Temperature sensors; Titanium;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.942434
