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Hybrid Superconducting-Ferromagnetic [Bi₂Sr₂(Ca,Y)₂Cu₃O10]0.99(La2/3Ba1/3MnO₃)0.01 Composite Thick Films
J Ricardo Mejía-Salazar1, José Darío Perea2,3, Roberto Castillo4
1National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí-MG 37540-000, Brazil. jrmejia@inatel.br.
Abstract:
We report here on the development of composite thick films exhibiting hybrid superconducting and ferromagnetic properties, produced through a low-cost, fast, and versatile process. These films were made of high T cuprate superconductor Bi₂Sr₂(Ca,Y)₂Cu₃O10 (with Y:Ca ratio of 5%) and ferromagnetic perovskite La2/3Ba1/3MnO₃, synthesized by melting-quenching annealing process on a MgO substrate. Curie temperature for La2/3Ba1/3MnO₃ was determined (~336 K ) by magnetic field assisted thermogravimetric analysis (TGA), while superconducting behavior of Bi₂Sr₂(Ca,Y)₂Cu₃O10/MgO films was observed through temperature-dependent resistance measurements. Superconducting features in our hybrid compound were corroborated by temperature-dependent resistivity and magnetic susceptibility.
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