Some measurements on the effective resistance and the hall angle in type II superconductors

摘要: Abstract Resistivity and transverse-voltage measurements on In-40 at % Pb Nb samples are reported. A model for flux pinning, which accounts the straight character of voltage versus current characteristics is presented compared with results. The influence surface layer in has been studied it found that mixed-state region a ineffective current-carrying capacity these samples. measured transverse voltages, can be divided into even odd components, discussed. It shown slight gradient applied magnetic field gives rise to rather large when usual potentiometer arrangement used. accuracy obtained uneven component badly influenced by this effect. calculated Hall angles In 60 Pb 40 show an increase mixed state. change sign angle state, suggested due mobility carriers within small cores vortices.