Preparation and characterization of a homemade Josephson junction prepared from a thin film sintered in a domestic microwave oven

• Autor(a) principal: Freitas, Gustavo Quereza
• Data de Publicação: 2016
• Outros Autores: Zadorosny, Rafael [UNESP], Rafael Cena, Cícero, Silveira, João Borsil [UNESP], Moreto, Jéferson Aparecido, Carvalho, Claudio Luiz [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/1980-5373-MR-2015-0475; http://hdl.handle.net/11449/172799
• topic: BPSCCO superconductor thin films; Josephson junction; Microwave oven

A homemade Josephson junction was successfully obtained using a superconductor thin film of the BSCCO system. The film was deposited on a lanthanum aluminate, produced from a commercial powder with a nominal composition Bi1.8Pb0.4Sr2CaCu2Ox, was thermally treated by a domestic microwave oven. The XRD analysis of the film indicated the coexistence of Bi-2212 and Bi-2223 phases and SEM images revealed that a typical superconductor plate-like morphology was formed. From the electrical characterization, performed using DC four probes technique, it was observed an onset superconducting transition temperature measured around 81K. At the current-voltage characteristics curve, a step of electric current at zero-voltage could be observed, an indicative that the tunneling Josephson °Ccurred.