Phase-field simulations on the electrocaloric properties of ferroelectric nanocylinders with the consideration of surface polarization effect

被引:13
|
作者
Zhu, Jun [1 ]
Chen, Haoyun [1 ]
Hou, Xu [2 ]
Xu, Linrong [1 ]
Wu, Huaping [3 ]
Wang, Jie [2 ]
机构
[1] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China
[2] Zhejiang Univ, Sch Aeronaut & Astronaut, Dept Engn Mech, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang Univ Technol, Minist Educ & Zhejiang Prov, Key Lab E&M, Hangzhou 310014, Zhejiang, Peoples R China
关键词
ELECTRICAL BOUNDARY-CONDITIONS; DOMAIN-STRUCTURES;
D O I
10.1063/1.5093554
中图分类号
O59 [应用物理学];
学科分类号
摘要
Due to the symmetry breaking on surfaces of a ferroelectric crystal, the polarizations on surfaces are different from those inside the crystal. To describe this surface polarization effect which depends on the surface atomic termination, the extrapolation length is incorporated in the phase-field method based on the time-dependent Ginzburg-Landau equation to investigate different surface polarizations and their influence on the electrocaloric properties in PbTiO3 nanocylinders. The simulation results show that the extrapolation length can alter the maximum value of the adiabatic temperature change and shift its temperature location.
引用
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页数:8
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