SPONTANEOUS POLARIZATION AND THE DISTRIBUTION OF INTERNAL STRESS AND ELECTRIC FIELDS AROUND A TRIPLE POINT

摘要

In this article,distributions of internal stress and internal electric fields around a triple pointof ferroelectric polycrystals generated by the spontaneous deformation and spontaneous polarization were in-vestigated.It was found that when all three grains consist of a single domain,the internal stresses and the in-ternal electric fields do not vanish.Though it may be determined according to the principle of energy,thespontaneous configuration will not be unique without involving other conditions due to the symmetry of thecrystal structure.