%0 Conference Proceedings %T Synthesize of YBa 2 Cu 3 O 7-δ nanoparticles and the coexistence of superconductivity and ferromagnetic phases %A Arabi, Hadi %A Saeedeh Jamshidi %A Ahmad Amirabadizadeh %J 4th International conference on nanostructures (ICNS4 %D 2012