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, … Show more
“…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.…”
A study of the effects of Cerium oxide nanoparticle doped with BSCCO-2223 on the microstructure and superconducting properties was carried out. All samples were synthesized using solid state reaction method. Ce concentration is varied from x = 0.0 up to 0.1 in a general stoichiometry of Bi1.6Pb0.4Sr2Ca1-xCexCu3Oy. The samples were characterized structurally and electrically by X-Ray Diffraction (XRD) and four-point probe method respectively. XRD analysis shows that both (Bi,Pb)-2212 and (Bi,Pb)-2223 phases coexist in the samples having tetragonal crystal structure but changed to orthorhombic when x=0.10. The values of critical transition temperature, TC and critical current density, JC of the samples decreased with the increase in Ce concentration. The possible reasons for the observed degradation in superconducting and structural properties of Bi-2223 due to Ce nanoparticles addition were discussed.
“…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.…”
A study of the effects of Cerium oxide nanoparticle doped with BSCCO-2223 on the microstructure and superconducting properties was carried out. All samples were synthesized using solid state reaction method. Ce concentration is varied from x = 0.0 up to 0.1 in a general stoichiometry of Bi1.6Pb0.4Sr2Ca1-xCexCu3Oy. The samples were characterized structurally and electrically by X-Ray Diffraction (XRD) and four-point probe method respectively. XRD analysis shows that both (Bi,Pb)-2212 and (Bi,Pb)-2223 phases coexist in the samples having tetragonal crystal structure but changed to orthorhombic when x=0.10. The values of critical transition temperature, TC and critical current density, JC of the samples decreased with the increase in Ce concentration. The possible reasons for the observed degradation in superconducting and structural properties of Bi-2223 due to Ce nanoparticles addition were discussed.
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