Negrican Sandalci 030070084 9th Week

ANTIPHASE BOUNDARY

(OLD)

There is no definition before.

(NEW)

According to Meleshina et al. (1974) there exists a strong attraction between the antiphase and ferroelastic boundaries. When a ferroelastic wall passes through an antiphase boundary it straightens the latter. When an antiphase boundary ends at a ferroellastic wall, the angle between thwm acquires a definite temperature – dependant value. The possibility of ending of antiphase boundaries at dislocationsis its important feature. As can be understood usind as the definition of the antiphase boundary , any edge dislocation with the proper Burger vector should give rise to an antiphase boundary in the low- symmetry phase: The dislocation provides a missing (or extra) lattice constant of the parent phase to form the phase shift of the order parameter across the antihase boundary.

(Alexander K. Tagantsev, L. Eric Cross,Jan Fousek, Domains in Ferroic Crystals and Thin Films, p. 240 )