Application of a graphical method to the domain switching of ferroelectrics subjected to electromechanical loading

Zhou, Yucheng1,2; Cao, Jingbin2; Cui, Yuanqing2

2019-10

10.1016/j.mechmat.2019.103078

MECHANICS OF MATERIALS   影响因子和分区

0167-6636

1872-7743

A change in the system Gibbs free energy can be used as a criterion for spontaneous reactions, including the ferroelectric domain switching process. In this work, a new effective graphical method is introduced to investigate the change in the Gibbs free energy of a grain system and intuitively represent the domain switching state since its expression is too complex to study directly. A barium titanate crystal is considered as an example, and only 90 degrees domain switching is involved. We can obtain two kinds of applications by virtue of the graphical method by controlling different variables in the change of the free energy: one application involves a new form of a ferroelectric domain switching criterion that considers the effect of the grain size, and the other application involves the critical single-domain grain size. For different loading methods, there will be different critical single-domain grain sizes in ferroelectrics.

Graphical method Gibbs free energy Domain switching criterion Critical size Ferroelectrics

SCI ; EI

英语

第一 ; 通讯

Materials Science ; Mechanics

Materials Science, Multidisciplinary ; Mechanics

WOS:000488136000044

ELSEVIER

20193407353795

Barium titanate ; Ferroelectricity ; Free energy ; Gibbs free energy ; Grain size and shape ; Graphic methods ; Switching

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Inorganic Compounds:804.2

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China
2.Tongji Univ, Sch Aerosp Engn & Appl Mech, 1239 Siping Rd, Shanghai 200092, Peoples R China

Zhou, Yucheng,Cao, Jingbin,Cui, Yuanqing. Application of a graphical method to the domain switching of ferroelectrics subjected to electromechanical loading[J]. MECHANICS OF MATERIALS,2019,137.

Zhou, Yucheng,Cao, Jingbin,&Cui, Yuanqing.(2019).Application of a graphical method to the domain switching of ferroelectrics subjected to electromechanical loading.MECHANICS OF MATERIALS,137.

Zhou, Yucheng,et al."Application of a graphical method to the domain switching of ferroelectrics subjected to electromechanical loading".MECHANICS OF MATERIALS 137(2019).