Switching inKNbO3single crystals containing cooperatively ordered impurity dipoles

1992 ◽  
Vol 45 (6) ◽  
pp. 2638-2647 ◽  
Author(s):  
S. G. Ingle ◽  
J. G. Dupare
Keyword(s):  
Impurity Dipoles

A Modified SBN System for Pyroelectric Sensors

2000 ◽  
Vol 655 ◽  
Author(s):  
H. Amorín ◽  
F. Guerrero ◽  
J. Portelles ◽  
M. Venet ◽  
A. Fundora ◽  
...  
Keyword(s):  
Remanent Polarization ◽  
Ferroelectric Ceramic ◽  
Pyroelectric Coefficient ◽  
Depolarization Current ◽  
Pyroelectric Sensors ◽  
Higher Temperature ◽  
Impurity Dipoles ◽  
Pyroelectric Response ◽  
Thermally Stimulated Depolarization ◽  
Second Peak

AbstractThe Thermally Stimulated Depolarization Current (TSDC) and pyroelectric properties of the modified SBN ferroelectric ceramic system were studied for different lanthanum and titanium doping concentrations. The TSDC measurements show the pyroelectric peak for all compositions while a second smaller peak at higher temperature, possibly associated to induced vacancy-impurity dipoles, is also observed in all cases. The second peak contribution was experimentally and mathematically eliminated to determine the remanent polarization and pyroelectric coefficient, both associated only to permanent ferroelectric dipoles. The figures of merit for sensor devices are determined for all compositions and compared with those of other pyroelectric systems. The La0.03Sr0.255Ba0.7 Nb1.95Ti0.05O5.975 sample, in particular, has excellent pyroelectric response, making this material very suitable for pyroelectricity-derived applications.

scholarly journals Cooperative ordering of impurity dipoles in KNbO3 single crystals

1992 ◽  
Vol 15 (3) ◽  
pp. 251-256 ◽  
Author(s):  
S G Ingle ◽  
K S Moon ◽  
R N Kakde
Keyword(s):  
Single Crystals ◽  
Impurity Dipoles ◽  
Cooperative Ordering
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