Lorentz Correction of Perovskite-type Crystal under Shear Stress and its Application to BaTiO₃ Crystal

Abstract

Correction of dipole fields in a perovskite-type crystal is calculated taking a shear of the crystal into account. It is found that the correction in x- and y- directions under shear stress are the same as those of article concerned to orthorhombic deformation (W. Kinase et al. J. Phys. Chem. Solids 30, (1969) 441). These results are applied to BaTiO₃ crystal, whose tetragonal-orthorhombic phase transition and piezoelectric effect due to shear stress are discussed.