Evidence of bidomain structure in double-perovskite La2CoMnO6 thin films

The authors report structural, magnetic, and electrical properties of parasitic phase-free, well-ordered epitaxial La2CoMnO6 films. Despite their single ferromagnetic transition around 240K, they demonstrate that they possess a bidomain structure with distinct magnetic characteristics. The B-site ordering in the films is achieved by growing the films at relatively high temperatures (∼800°C) and O2 pressures (∼600mTorr). Films exhibit a maximum 5.8μB∕f.u. saturation magnetization and magnetic easy axis parallel to SrTiO3 (110). The origin of the bidomain structure is briefly discussed.