  The lattice strain and domain switching behaviour was investigated as a
function of cyclic field and grain orientation for a pseudorhombohedral
composition of the high Curie point piezoelectric system xBiScO3 - (1-x)PbTiO3
(x = 0.40) by in-situ electric field diffraction technique with high energy
synchrotron x-rays. Along the field direction, the system exhibts five time
large strain along 100 as compared to the 111 direction. A one-to-one
correspondence between the 200 lattice strain and the 111 domain switching
suggests a strong correlation between the two phenomena.
