Influence of Eu and Rh Impurities on Distribution of Polarization of Strontium-Barium Niobate Crystals

Abstract

The pyroelectric coefficient distribution that represents the polarization profile of pure SBN and SBN crystals doped with europium and rhodium was determined from the pyroelectric response by analyzing the time dependence of the pyroelectric response by using the thermal square wave method at single frequency. It has been shown that the dependence of the domain distribution density along the polar axis obtained from the domain images is in accordance with pyroelectric coefficient distribution over the thickness of investigated crystals.

Keywords:

• Ferroelectrics
• domain structure
• pyroelectric effect

Acknowledgments

The authors are grateful to Prof. S. Kapphan and R. Pankrath (University of Osnabruck, Germany) for the SBN crystals given for research.

This work was supported by Grants RNP 2.1.1.3674 and RNP.2.2.2.3.10101 of the Ministry of Education and Science of the Russian Federation. One of the authors (D.A. Kiselev) is very grateful to the Portuguese Foundation for Science and Technology (FCT, grant SFRH/BD/22391/2005) for the support.