**4. Conclusion**

The electrocaloric properties of (Pb,La)(Zr,Ti)O3 (PLZT) and BaTiO3 ceramics were investigat‐ ed by the indirect estimation and direct measurement of temperature–electric field (T–E) hysteresis loops. The measured T-E loops showed a similar shape to strain–electric field (s–E) loops. This suggests the ECE of these materials are mainly governed by the change of their polarization. The extrinsic contribution from the multi-domain behavior to ECE is limited. The adiabatic temperature change ∆T due to electrocaloric effects was estimated from the polari‐ zation change of these samples. ∆Ts of 0.58 and 0.36 K were estimated for the (Pb,La) (Zr,Ti)O3 (PLZT)(9.1/65/35) ceramics and BaTiO3 ceramics sintered at 1400°C, respectively. The measured temperature changes, ∆Ts, in these samples upon the release of the electric field from 30 kV/cm to zero were 0.26 and 0.29 K, respectively.
