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We have measured the in-plane magnetoresistivity, ρ(T,H), of YBa 2 Cu 3 O 7-δ , Bi 2 Sr 2 CaCu 2 O 8 and Tl 2 Ba 2 Ca 2 Cu 3 O 10 crystals with small stoichiometric inhomogeneities at long length scales and uniformly and non-uniformly distributed in the crystals. These stoichiometric...
In granular superconductors there are two distinct measurable electrical resistivities, namely the normal state resistivity and the paracoherent resistivity. For the later, we understand the resistivity due only to the intergrain boundaries, i.e. when the intragrains have become superconducting, and it is straightforwardly measurable from the current-voltage characteristics below the critical temperature...
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