Electrocaloric Effect in Na_1/2Bi_1/2TiO₃-SrTiO₃-PbTiO₃Solid Solutions

Abstract

Abstract Electrocaloric effect is studied in a group of triple solid solutions 0.4Na1/2Bi1/2TiO3-(0.6-y)SrTiO3-yPbTiO3. Contribution of electric field-induced phase transition in the total value of temperature change, caused by electric field, is evaluated. The highest value of electrocaloric effect is observed for composition 0.4Na1/2Bi1/2TiO3-0.4SrTiO3-0.2PbTiO3, in which the depolarization temperature, characteristic for relaxor ferroelectrics, merges with the temperature of maximum of dielectric permittivity. Applicability of thermodynamic description is discussed. Keywords: NBTrelaxorssolid solutionselectrocaloric effect Acknowledgments This work has been supported by the European Social Fund within the project "Support for Doctoral Studies at University of Latvia" and L'ORÉAL Latvian "For Women In Science" fellowship with the support of the Latvian National Commission for UNESCO and the Latvian Academy of Sciences.