Sr2MgMoO6−δ thin films fabricated using pulsed-laser deposition with high concentrations of oxygen vacancies

We fabricated epitaxial thin films of oxygen-vacant Sr2MgMoO6−δ using pulsed laser deposition. The films showed low resistivity of the order of 10−2 Ω cm at 300 K. X-ray diffraction analyses revealed that Mg and Mo ions in the Sr2MgMoO6−δ films were considerably disordered, compared to those in bulk Sr2MgMoO6−δ. The proportion of oxygen vacancies estimated through hard x-ray photoemission measurements was as large as 0.37, and correlated well with the Mg/Mo ordering.