High resolution scanning transmission electron microscope and electron energy loss spectroscopy spectrum imaging methods were successfully applied to the analysis of planar antiphase boundaries in (Bi0.85Nd0.15)(Fe0.9Ti0.1)O3 ceramics. Two distinct structures for these boundaries were identified, one of which has never previously been reported for perovskites. This latter form has a characteristic ladder structure in the core, and comes in stepped and unstepped forms. Atomic resolution spectrum imaging reveals that excess Ti was key to the formation of these ladder-structured antiphase boundaries.

Atomic Scale Structure and Chemistry of Anti-Phase Boundaries in (Bi0.85Nd0.15)(Fe0.9Ti0.1)O3 Ceramics. L.Q.Wang, B.Schaffer, I.MacLaren, S.Miao, A.J.Craven, I.M.Reaney: Journal of Physics - Conference Series, 2012, 371[1], 012036