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The electrocaloric effect of BaTiO3 multilayer thick film structure wasinvestigated by direct measurement and theoretical calculation. The sampleswere prepared by the tape-casting method, which had 180 dielectric layers withan average thickness of 1.4\mu m. The thermodynamic calculation based on thepolarization- temperature curves predicted a peak heat adsorption of 0.32J/g at80^\circC under 176kV/cm electric field. The direct measurement viadifferential scanning calorimeter showed a much higher electrocaloric effect of0.91J/g at 80^\circC under same electric field. The difference could resultfrom the different trends of changes of electric polarization and latticeelastic energy under ultrahigh electric field.

Direct measurement of giant electrocaloric effect in BaTiO3 multilayer thick film structure beyond theoretical prediction