Preparation and properties of Pb-doped Bi-Sr-Ca-Cu-O superconductors

15 August 1989

journal article
letter
Published by AIP Publishing in Journal of Applied Physics

Vol. 66 (4) , 1881-1883
https://doi.org/10.1063/1.344370

Abstract

Electrical and magnetic properties of the superconducting oxides with nominal composition (Bi_0.7 Pb_0.3 )₂Sr₂Ca₂ Cu₃ O_x prepared from polymeric precursors have been investigated. Superconducting transition with zero‐resistance temperature at T=108 K was achieved for a sample sintered at 840 °C under a low oxygen pressure. The critical current density at 77 K in a zero magnetic field is ∼400 A/cm² , which is much higher than that of the Pb‐free sample. Variations of the superconducting transition temperature, the critical current density, and magnetic properties with heat treatment time are discussed in connection with the structural properties.

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