[19a-133-1~12] 6.1 Ferroelectric thin films

[19a-133-3] Electrocaloric effects in antiferroelectric PbZrO₃ thin films

〇Hiroshi Maiwa¹ (1.Shonan Inst. Tech.)

Keywords:Anti-ferroelectrics, electrocaloric effect

Temperature dependences of polarization hysteresis loops of PbZrO₃ thin films fabricated chemical solution deposition were evaluated for applications of energy storage capacitor and the cooling refrigeration using electrocaloric effects. The maximum polarization did not change to 175℃ and decreased at 205℃. With increasing of temperature, the stored energy decreased in keeping pace with the monotonous decrease of switching electric fields of double hysteresis lops. Temperature dependence of the polarization, P(T), under different electric field draw convex curves on the top. P(T) curves with positive slope are observed at temperatures below 145℃ under electric field less than 300kV/cm. The adiabatic temperature change DT of -4.4℃ at 25℃ is estimated under DE = 160kV/cm.