Electrical and magnetic properties in Bi : 2223 bulk doped with Cr

High-T-c cuprates of "Bi-2223" bulk doped with Cr 0 less than or equal to x less than or equal to 0.10 were prepared by the conventional solid state r eaction method. The samples were investigated by electrical resistivity, Ha ll effect, Nernst effect, ac susceptibility and thermopower measurements in mixed and normal states. The transport coefficients depend strongly on the Cr contents in the samples. The temperature dependence n(H)(T) and inverse Hall mobility mu(H)(-1)(T-2) show an anomaly at a temperature around 240 K . These anomalies are discussed in the framework of phase separation theory . The experimental data in the mixed state are in agreement with the predic tions of the time-dependent Ginsburg-Landau theory.