Synthesis, magnetic and structural studies of the 110 K phase of Bi1.6 Pb0.4 Sr2 Ca2 Cu3 Oy high Tc superconductor

Abstract Characterization of samples of Bi1.6 Pb0.4 Sr2 Ca2 Cu3 Oy composition through XRD, SEM, EDAX, EPR, microwave absorption(MA), resistivity(ϱ(T)) and ac-susceptibility(χac) measurements has shown that the material consists of a single phase. Temperature dependence of imaginary part of χac exhibits a sharp peak at the transition temperature(Tc) whereas the real part undergoes a sharp diamagnetic transition. The width(ΔTc) estimated from the plot of dϱ/dT vs temperature is 3K. The field dependence of MA has shown hysteresis. The effect of field cooling(FC) and zero field cooling (ZFC) on low-field dependent MA reveals that the area of hysteresis loop of the FC sample has decreased significantly as compared to that the ZFC.