AC susceptibility study in the single-phase Bi-2223 system

Abstract

We have found that the composition, Bi1.2Pb0.33Sr1.54Ca2.06Cu3Oy which is comparatively poorer in Bi and Sr with respect to 2 : 2 : 2 : 3, a single-phase 110 K superconductor can be obtained. Such polycrystalline samples have been synthesized by two different methods. The synthesized samples have been characterized by their X-ray diffraction patterns and temperature dependence of DC electrical resistivity and AC susceptibility down to 20 K have been carried out. The samples have been identified as having single phase with a sharp transition. The results of their AC susceptibility have been analysed using Clem's critical state model. The effective volume fraction of the grains and the temperature dependence of the intergranular current density have been estimated.

Effect of γ-irradiation on the transport and structural properties of polycrystalline Bi1.2 Pb0.33 Sr1.54 Ca2.06 Cu3 O10+δ superconductor

“…Polycrystalline sample of Bi 1.2 Pb 0.33 Sr 1.54 Ca 2.06 Cu 3 O 10+δ was synthesized by nitrate routes followed by air quenching, reported elsewhere [20]. The synthesized sample was characterized by X-ray diffraction (XRD) using a Philips XRD machine with CuK α radiation at room temperature.…”