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

AUTOR(ES)

Freitas, Gustavo Quereza, Zadorosny, Rafael, Cena, Cícero Rafael, Silveira, João Borsil, Moreto, Jéferson Aparecido, Carvalho, Claudio Luiz

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

08/03/2016

RESUMO

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 occurred.

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