Giant negative electrocaloric effect in PbZrO3/0.88BaTiO3-0.12Bi(Mg1/2,Ti1/2)O3 multilayered composite ferroelectric thin film for solid-state refrigeration.

Authors :: Huang, D.
Wang, J. B.
Zhong, X. L.
Li, B.
Zhang, Y.
Jin, C.
Zheng, D. F.
Meng, X. J.
Source :: Journal of Applied Physics; 11/21/2017, Vol. 122 Issue 19, p1-5, 5p, 1 Chart, 3 Graphs
Publication Year :: 2017
Abstract: A giant negative electrocaloric (EC) effect in a PbZrO3/(0.88BaTiO<subscript>3</subscript>-0.12 Bi(Mg<subscript>1/2</subscript>,Ti<subscript>1/2</subscript>)O<subscript>3</subscript>) (PZ/(BT-BMT)) multilayered composite ferroelectric (MCFE) thin film which is grown on Pt(111)/Ti/SiO<subscript>2</subscript>/Si(100) substrates by the sol-gel method is investigated in this work. The negative EC effect in the PZ/(BMT-BT) MCFE thin film is greatly higher than that in the PZ AFE thin film with an adiabatic temperature change (ATC) ΔT = 1.5 K. The ATC ΔT of the PZ/(BMT-BT) MCFE thin film is -32 K under the applied electric field change ΔE = 1151 kV/cm. The result is conducive to enhance the EC refrigeration efficiency greatly. [ABSTRACT FROM AUTHOR]

Subjects :: FERROELECTRIC thin films
FERROELECTRICITY
PHOTOFERROELECTRIC effect
PYROELECTRICITY
SOL-gel processes
ELECTRIC fields
ADIABATIC temperature

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