MAGNETOTRANSPORT STUDY OF IN-SITU MAGNETIC-FIELD TEXTURED DY1BA2CU3O7-DELTA SUPERCONDUCTORS

The electrical resistivity, thermoelectric power and the Nernst effect have been studied as a function of temperature and magnetic field for a typical superconductor DyBa2Cu3O7-delta magnetically textured in si tu at 1035 degrees C. The three transport coefficients show hybrid mic roscopic features. In particular, we show the anisotropy with respect: to the field direction (H//a, H//c) in all transport coefficients. We verify that Tinkham's law is obeyed for the broadening of the resisti ve transition in a magnetic field. Similarly we obtain anisotropic bro adening exponents for each integrated excess property. From Arrhenius plots we obtain orders of magnitude for the activation energies charac terizing each property. They are markedly different from each other.