The Hall effect of the superconducting oxides (Bi, Pb)₂Ca₂Sr₂Cu₃O_y

Abstract

The temperature dependence of the Hall coefficient RH has been measured between 50 and 250 K for the superconducting compounds with nominal compositions Bi2Ca2Sr2Cu3Oy and Bi1.6Pb0.4Ca2Sr2Cu3Oy. It is found that the Hall number, nH, is linearly T-dependent and field-independent in the normal state and decreases rapidly on doping with lead. This result is quite in agreement with the recent theoretical calculation proposed by Xing and co-workers (1988). A large anomaly in RH is observed around Tc, which is discussed in terms of the intergranular structure of this material.