Antiferroelectricity in pure ferroelastics

被引:0
|
作者
Toledano, Pierre [1 ]
Li, Gen [2 ]
机构
[1] Univ Picardie, Lab Phys Complex Syst, F-80000 Amiens, France
[2] Palace Museum, Beijing 100009, Peoples R China
关键词
PHASE-TRANSITION; TRANSFORMATION; CRYSTALS;
D O I
10.1103/PhysRevB.103.L220101
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In pure ferroelastics, the coupling existing under applied electric field between spontaneous strain and electric polarization is shown theoretically to transform the paraelastic and ferroelastic phases into polarized phases. This effect is rooted in the existence in the zero-field crystal structure of most ferroelastics of polarizable crystallographic sites forming an antiferroelectric array of dipoles. Under high fields the polar ferroelastic phase can become ferroelectric across a first-order isostructural transition, which exhibits a double hysteresis loop.
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页数:6
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