Structure and Magnetic Characterization of BiFeO3/YBa2Cu3O7 Bilayers

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/La0.67Sr0.33MnO3 films 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.