lattice distortion(lattice deformation)
1.The formation mechanism of engineered domain in PMNT crystals is discussed in terms of the orientation and distortion of anionic coordination-polyhedron units. Engineered domain is induced by the B-ion displacement and deformation of B octahedron,when the A-site ions displace along a,b and c tunnels under E-field. The domains in rhombohedral and tetragonal lattice distribute along the diagonal direction of B octahedrons.
