Structure and Magnetic Characterization οf BiFeO3/YBa2Cu3O7Bilayers

Bilayered epitaxial BiFeO3/YBa2Cu3O7 films were fabricated on (100) [(LaAlO3)0.3(Sr2TaAlO6)0.7]substrates by sputtering method.For structural comparison the bilayered BiFeO3/La0.67Sr0.33MnO3films were also deposited on (100) SrTiO3 substrates.A weak ferromagnetic moment is observed in BiFeO3/YBa2Cu3O7 films.The mechanism responsible for weak ferromagnetic moment arises presumably from the epitaxy strain induced canted antiferromagnetic structure.