title: Electrocaloric response near room temperature in Zr- and Sn-doped BaTiO3 systems.
abstract: The electrocaloric effect (ECE) in (1-x)BaZr0.18 Ti0.82O3-(x)BaSn0.11Ti0.89O3 (BZT18-BST11, 0.1≤x≤0.5) ceramics is investigated near room temperature using a calorimetry method. The ceramics exhibit relaxor-like ferroelectric characteristics and by merging phases, a large electrocaloric (EC) response is observed in the system. The largest entropy change is 4.8 Jkg(-1) K(-1) (along with a temperature change of 3.5 K), which is induced under an electric field of 10 MV m(-1) for the 0.8 BaZr0.18Ti0.82O3-0.2 BaSn0.11Ti0.89O3 ceramics. This result reveals that the coexistence of multiple phases improves the ECE of the ceramics, which provides an effective route to achieve a large EC response using a small electric field.This article is part of the themed issue 'Taking the temperature of phase transitions in cool materials'.
authors.affiliation: Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA Department of Physics, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Hou
authors.affiliation: Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Lu
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Xiaoshi
authors.initials: X
authors.lastname: Qian
authors.affiliation: Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Tian
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA qxz1@psu.edu.
authors.forename: Q M
authors.initials: QM
authors.lastname: Zhang
keywords: Zr- and Sn-doped BaTio3; electrocaloric; ferroelectric