Metallic behavior induced by slight N doping in Sr2FeMoO6 double perovskite compoundGuoyan Huo, Jingxiao Zhou, Chaolin Li, Ning Zhang, Jingjuan Wen and Hua FengEur. Phys. J. Appl. Phys., 72 2 (2015) 20102DOI: https://doi.org/10.1051/epjap/2015150268