Theoretical determination of domain structure at transitions from twinned phase : Application to the tetragonal-orthorhombic transition of KNb0₃

Abstract

Abstract The theoretical determination of the initial domain structure and the phase boundary orientation inducing a wanted domain structure in the new phase seems to be a study of worthwhile interest. The W. L. R. theory {1} is not suitable for complex domain structure in each phase because mean distortions of the new phase cannot be expressed in terms of the older one. So, an other algorithm is proposed to solve this problem.