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Magnetoresistivity, Seebeck, Nernst and Hall effects in the mixed and normal state of (Bi1.6Pb0.4)Sr2Ca2 (Cu1-xNix)3Oy epitaxial films

par Ilonca, Gh;Pop, Aurel ;Deac, Iosif Gr.;Lung, Claudiu;Jurcut, Teodor;Deltour, Robert
Référence Physica. C, Superconductivity, 341-348, page (IV/)
Publication Publié, 2000-11

Article révisé par les pairs

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Résumé :

Measurements of the ac susceptibility, magnetoresistivity, Seebeck, Nernst, and Hall coefficients in Ni doped (Bi,Pb)2223 superconductors, in magnetic fields between 0 and 5 T, and in the temperature range 5-300 K, are reported. The critical temperatures, the Hall, Nernst and Seebeck coefficients depend strongly on the nickel content. In the mixed state and fluctuation regime these can be explained by Ginsburg - Landau theory. The deviation from linear dependence of μH-1 = f(T2), nH(T) in normal sate can be interpreted in the percolative phase separation theory, and S(T) dependence in the frame of the asymmetric narrow - band theory.