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

Abstract

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 Bi 1.8 Pb 0.4 Sr 2 CaCu 2 O x , 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.

Effect of CeO₂ Nanoparticle on the Structural and Electrical Properties of BSCCO-2223 High Temperature Superconductor

“…The superconducting transition, ΔT (full width at half maximum (FWHM) in dR/dT vs T curves) increased compared to undoped samples. The mid-point obtained from the dR/dT vs T graph indicates the critical temperature, Tc values [12]. The ΔT values obtained was 5.28 K, 7.12 K, 7.95 K and 12.18 K for samples with x = 0.00, 0.02, 0.05 and 0.10 respectively.…”