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Ferroelectrics Volume 399, 2010 - Issue 1
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Original Articles

Field-Induced Enhancement of Pyroelectric Response of PbMg1/3Nb2/3O3-PbTiO3 and PbFe1/2Nb1/2O3-PbTiO3 Solid Solution Ceramics

Yu. N. Zakharov Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
S. I. Raevskaya Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
A. G. Lutokhin Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
V. V. Titov Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
I. P. Raevski Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
V. G. Smotrakov Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
V. V. Eremkin Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
,
A. S. Emelyanov Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
&
A. A. Pavelko Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia
 show all
Pages 20-26 | Received 16 Sep 2009, Accepted 16 Mar 2010, Published online: 23 Jun 2010
 
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Abstract

A dramatic influence of bias field on pyroelectric response was revealed for ceramics of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 with x = 0.075, 0.33 and 0.98Pb(Fe1/2Nb1/2) O3–0.02PbTiO3. Temperature and bias field dependency of the dielectric permittivity and dynamic pyroelectric coefficient have been studied to establish possible relation of the enhanced pyroelectric activity with the E-T phase diagram. In relaxor ceramic composition PMN-0.075 the highest pyroelectric coefficient was achieved at the point having quasi-critical features. These data support an assumption of quasi-critical behavior of the pyroelectric response in relaxor ceramics, in accord with our previous data for relaxor single crystals.

Acknowledgments

This study was partly supported by the Russian Foundation for Basic Research (RFBR) grant 09-02-92672 IND_a and FTP (State contract P-487).

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