Influence of Thermocycling on the Polarization Distribution of Doped SBN Crystals

Abstract

Influence of thermocycling on the polarization state in the SBN crystals doped with Eu or Rh was examined. The polarization depth profile was controlled by measuring the depth dependence of the pyroelectric coefficient by Thermal Square Wave method. The switching processes were studied using the thermal Barkhausen effect method. It has been shown that heating/cooling cycle results in essential depolarization of both studied materials.

Keywords:

• Ferroelectrics
• pyroelectric effect
• polarization distribution
• thermal Barkhausen effect

Acknowledgments

This work was supported by Grants RFBR 08-02-97502-r_center_a and RNP 2.2.2.3.8101 of the Ministry of Education and Science of the Russia Federation, Federal Target Program Research and Research-Pedagogical Personnel of Innovation Russia for 2009-2013. 02.740.11.0131.