2000 character limit reached
Ab-inito study of low temperature magnetic properties of double perovskite Sr2FeOsO6 (1403.4894v1)
Published 19 Mar 2014 in cond-mat.mtrl-sci and cond-mat.str-el
Abstract: Using density-functional theory calculations, we investigated the electronic structure and magnetic exchange interactions of the ordered 3d-5d double perovskite Sr2FeOsO6, which has recently drawn attention for interesting antiferromagnetic transitions. Our study reveals the vital role played by long-range magnetic exchange interactions in this compound. The competition between the ferromagnetic nearest neighbor Os-O-Fe interaction and antiferromagnetic next nearest neighbor Os-O-Fe-O-Os interaction induces strong frustration in this system, which explains the lattice distortion and magnetic phase transitions observed in experiments.