Formation of two-dimensional ordered nanodomains and curious properties of Sr3FeMoO7

Abstract

Sr₃FeMoO₇ is a n = 2 Ruddlesden–Popper analogue of the famous double perovskite Sr₂FeMoO₆ (SFMO), where every two layers of transition metal BO₆ (B = Fe, Mo) octahedral planes are interrupted along the c-direction by a SrO layer. Interestingly, these two-dimensional BO₆ layers are found to form many highly ordered Fe–O–Mo flat nanodomains separated by antiphase boundaries (APBs) and the interaction between these disc-like ordered domains give rise to interesting magnetic, transport, and magnetotransport properties, such as large magnetoresistance as well as a strong electroresistance.