A Study of the Magnetic Properties of Bi1.64−xPb0.36CdxSr2Ca2Cu3Oy Superconductor

The flux pinning energy and magnetic properties of Bi 1.64− x Pb 0.36 Cd x Sr 2 Ca 2 Cu 3 O y (BPCSCCO) with x =0.0, 0.02, 0.04 and 0.06 were studied. A series of Bi-2223 superconductor samples with a nominal composition of BPCSCCO was synthesized and the effect of Cd substitution for Bi was investi...

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Veröffentlicht in:	Journal of superconductivity and novel magnetism 2011-07, Vol.24 (5), p.1505-1511
Hauptverfasser:	Zargar Shoushtari, M., Mousavi Ghahfarokhi, S. E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Annealing ANNEALING PROCESSES Cadmium Characterization and Evaluation of Materials Condensed Matter Physics Condensed matter: electronic structure, electrical, magnetic, and optical properties Effects of material synthesis, crystal structure, and chemical composition Exact sciences and technology Flux pinning Magnetic Materials MAGNETIC PERMEABILITY MAGNETIC PROPERTIES Magnetism Original Paper PERMEABILITY Physics Physics and Astronomy PINNING PROPERTIES Properties of type I and type II superconductors Strongly Correlated Systems SUPERCONDUCTIVITY SUPERCONDUCTORS Transition temperature variations VOLTAGE Vortex lattices ,flux pinning, flux creep
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Zusammenfassung:	The flux pinning energy and magnetic properties of Bi 1.64− x Pb 0.36 Cd x Sr 2 Ca 2 Cu 3 O y (BPCSCCO) with x =0.0, 0.02, 0.04 and 0.06 were studied. A series of Bi-2223 superconductor samples with a nominal composition of BPCSCCO was synthesized and the effect of Cd substitution for Bi was investigated. As a result, Cd addition has been found to improve the superconducting properties of the Bi-Pb-Sr-Ca-Cu-O system. The effects of the annealing time and the amount of Cd doping on the structure, AC magnetic susceptibility, ρ – T curves and flux pinning energy were investigated. Also, for all samples the relation between the current and voltage in the mixed state was found to follow the model relationship V = α I β . The maximum value of β is 22.30, which is obtained for the sample with an annealing time of 270 h and a Cd content of 0.04.
ISSN:	1557-1939 1557-1947
DOI:	10.1007/s10948-010-0899-1