Bias Field Effect on the Dielectric and Pyroelectric Response of Single Crystal of Uniaxial Relaxor Sr_0.75Ba_0.25Nb₂O₆

S. I. Raevskaya Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

A. G. Lutokhin Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

A. M. Pugachev Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk, 630090, Russia

I. P. Raevski Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

V. V. Titov Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

Yu. N. Zakharov Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

D. V. Suzdalev Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

E. M. Panchenko Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

S. A. Prosandeev Research Institute of Physics and Physical Department of Southern Federal University, Rostov on Don, 344090, Russia

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Abstract

Dielectric and pyroelectric studies of lead-free uniaxial relaxor Sr_0.75Ba_0.25Nb₂O₆ (SBN75) single crystals have been carried out under different bias field values. E,T-phase diagram has been constructed using these data. Dependences of both the temperature and the height of dielectric permittivity and pyroelectric coefficient maxima on the bias field are similar to those observed previously for PbMg_1/3Nb_2/3O₃ - PbTiO₃ crystals and support the presence of the critical endpoint in the E,T-phase diagram of SBN75 and a critical behavior of field-induced pyroelectric response in uniaxial relaxors.

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Acknowledgments

This study is partially supported by the Russian Foundation for Basic Research (RFBR) project 08-02-92006 NNS_a.

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Bias Field Effect on the Dielectric and Pyroelectric Response of Single Crystal of Uniaxial Relaxor Sr_0.75Ba_0.25Nb₂O₆

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Bias Field Effect on the Dielectric and Pyroelectric Response of Single Crystal of Uniaxial Relaxor Sr0.75Ba0.25Nb2O6

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Bias Field Effect on the Dielectric and Pyroelectric Response of Single Crystal of Uniaxial Relaxor Sr_0.75Ba_0.25Nb₂O₆