The interaction of domain wall in ferroelectric-ferroelastic crystal with dilatation center

The interaction between the domain wall and point defect of elastic nature is investigated. It is shown that in the process of interaction arises the flexing of domain wall which leads to the appearance of twinning dislocations destroying the elastic fields of defect and hence the attraction appears between the defect and wall. The spontaneous polarization causes the additional stiffness for the flexing displacements of domain wall that decreases the interaction energy as compared with pure elastic.

Keywords:

• twinning dislocations
• non-compatibility
• domain wall
• dilatation