Indications of spin-polarized transport in thin film double perovskites Sr2FeMoO6 and Ba2FeMoO6

Double perovskite oxides Sr2FeMoO6 and Ba2FeMoO6 have attracted attention for spintronic device development due to their predicted highly spin-polarized transport characteristics. However, most published experimental results are from bulk material, not thin films that are more relevant for realistic device development. We will present our results of the growth as well as structural, magnetic and transport properties of thin films of double perovskites Sr2FeMoO6 and Ba2FeMoO6 produced by pulsed laser deposition. We have produced highly crystalline, near-epitaxial thin films of each material. We will survey the magnetic and magnetotransport properties, including the magnetoresistance, planar and anomalous Hall effects, which provide evidence for the presence of spin-polarized charge carriers well above room temperature and the potential for developing high sensitivity magnetic sensors.