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Critical current; superconductivity; magnetization measurements

HighT_c phase (T_c ∼ 110 K) has been obtained in Bi-Sr-Ca-Cu-O system by partially substituting Bi by Pb. Magnetic hysteresis has been measured as a function of temperature. Critical current densities have been measured at 77 K both by transport and a.c. magnetization method in bulk samples for various concentrations of Pb. The results show that substitution of 15 at % Pb for Bi is most preferable for higher critical current density.

P K Mishra¹ Shailendra Kumar¹ G Ravikumar¹ P Chaddah¹ B A Dasannacharya¹ Ram Prasad^{1 2} N C Soni^{1 2}

1. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
2. Metallurgy Division, Bhabha Atomic Research Centre, Bombay - 400 085, India

Published

August 1991