High-resolution electrocaloric and heat capacity measurements in barium titanate
1 Jožef Stefan Institute - Jamova 39, 1000 Ljubljana, Slovenia, EU
2 Jožef Stefan International Postgraduate School - Jamova 39, 1000 Ljubljana, Slovenia, EU
Received: 14 August 2013
Accepted: 21 August 2013
The electrocaloric (EC) effect in a BaTiO3 single crystal oriented along the  direction has been studied by direct high-resolution EC measurements in the vicinity of the field-induced critical point. It is shown that the observed behavior of the EC temperature change , as well as the heat capacity anomalies are in good agreement with the predictions of the Landau theory. We also present the electric field-temperature phase diagram for the field-induced paraelectric-to-ferroelectric phase transition line, derived from the calculated latent heat.
PACS: 77.70.+a – Pyroelectric and electrocaloric effects / 05.70.Jk – Critical point phenomena / 65.40.Ba – Heat capacity
© EPLA, 2013