Abstract
High-T c cuprates of "Bi-2223" bulk doped with Cr 0≤ x≤ 0.10 were prepared by the conventional solid state reaction method. The samples were investigated by electrical resistivity, Hall 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 nH(T) and inverse Hall mobility [Formula: see text] 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 predictions of the time-dependent Ginsburg–Landau theory.
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