Materials Research (Mar 2016)

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

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

DOI
https://doi.org/10.1590/1980-5373-MR-2015-0475
Journal volume & issue
Vol. 19, no. 2
pp. 295 – 299

Abstract

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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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