Dielectric hysteresis and pyroelectricity in the La0.03Sr0.255Ba0.7Nb2-yTiyO(6-y)/2 ferroelectric ceramic system

被引：10

作者：

Amorín, H ^{[1
]}

Portelles, J

Guerrero, F

Pérez, J

Siqueiros, JM

机构：

[1] Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba

[2] Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico

[3] Univ Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, Cuba

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 113卷 / 10期

关键词：

ferroelectronics; chemical synthesis; dielectric response;

D O I：

10.1016/S0038-1098(99)00541-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dielectric hysteresis and pyroelectric properties of the La0.03Sr0.255Ba0.7Nb2-yTiyO(6-y)/2 (LSBNT) ceramic system were studied for different Nb/Ti concentrations. For dielectric hysteresis measurements at room temperature, the remanent polarization increases and the: coercive field decreases with titanium concentration for an applied electric field of 20 kV/cm. The thermally stimulated current measurements show the pyroelectric peak for all compositions while a second smaller peak at higher temperature, possibly associated with induced vacancy-impurity dipoles, is also observed in all cases. The second peak contribution was mathematically eliminated to determine the remanent polarization and pyroelectric coefficient, both associated only with permanent ferroelectric dipoles. In this case, the remanent polarization decreased with the rise in titanium concentration. The La0.03Sr0.255Ba0.7Nb1.95Ti0.05O5.975 sample, in particular, has excellent pyroelectric response, making this material very suitable for pyroelectricity-derived applications. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：581 / 585

页数：5

共 24 条

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