Investigation of Sm → Ca substitution in Bi(Pb)SrCaCuO high temperature superconductor by low field AC magnetic susceptibility
2007
Terzioglu, Cabir | Yegen, Dincer | Yılmazlar, Mustafa | Gorur, Osman | Akdogan, Mustafa | Varilci, Ahmet
We have investigated the effect of Sm substitution in Bi(Pb)SrCaCuO system by performing AC susceptibility ([Formula: see text]), XRD (X Ray Diffraction) and SEM (Scanning Electron Microscopy) measurements. The Sm → Ca substitution (Bi₁.₆Pb₀.₄Sr₂Ca₂₋ₓSmₓCu₃Oy) was carried out by conventional solid-state reaction method. The susceptibility measurements were carried out at different values of the AC field amplitudes. The imaginary part of susceptibility is used to estimate the intergranular critical current density by means of the Bean’s model. The intergranular critical current density (J c) of pure sample is found to be about 68 A/cm² at 95 K. The intergranular J c is seen to decrease with increasing Sm substitution. XRD pattern and SEM micrographs are given to provide information about Bi-2223 phase and grain size respectively.
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