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Published on: May 15, 2017
Electrocaloric Effect of (K1-xNax)NbO₃ Single Crystal
MinYa Jin1, JianHua Qiu1, ZhiHui Chen1
1School of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
Abstract:
The electrocaloric effect of (K1-Na)NbO₃ single crystal is calculated based on Landau-Devonshire theory. The electrocaloric coefficient and adiabatic temperature change are calculated with the variation of temperature in rhombohedral, orthorhombic and tetragonal phase. A maximum of electrocaloric coefficient is obtained in each ferroelectric phase. Moreover, the tetragonal phase presents the larger electrocaloric coefficient and adiabatic temperature change than that rhombohedral and orthorhombic phase. However, the large electrocaloric effect is also obtained at room temperature with the adiabatic temperature change of 0.5 K, which tallies with the experimental findings.
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