ELECTRICAL AND THERMOMAGNETIC EFFECTS IN BI1.7PB0.3SR2CA2CU3O10 SUPERCONDUCTING CERAMICS

We report the electrical resistivity and thermoelectric power of polyc rystalline Pb-doped Pi 2:2:2:3 superconductors. In particular the mixe d-state properties are investigated by measuring the longitudinal and transverse (Nernst) thermoelectric power. For the first time we show t he presence of hysteresis in a high magnetic field for the Nernst effe ct. We discuss the variation with magnetic field in the properties wit h respect to the zero-field case and show the power-law behaviour with exponents depending on the transport quantity. We extract 'derived pr operties' such as the effective mass, the transport entropy, the Ginzb urg-Landau parameter, the thermal Hall angle and the activation energy and compare them with previous data on related systems.