The Influence of Structural Inhomogeneities on Intragranular Properties of Y- and Bi-based Superconductors
نویسنده
چکیده
The measurements of temperature dependence of AC magnetic susceptibility were used to study the influence of inhomogeneities on intragranular superconducting properties of Y Ba2Cu3−XMXOY (M=Fe,X=0,005;Al,X=0,01;Cr, X=0,01), Bi1,7Pb0,2Sb0,1Sr2Ca2Cu3OY and Bi1,5Pb0,3Sb0,2Sr2Ca2Cu3OY ceramics. It is found that step-like regions are revealed on AC magnetic field dependence curves T g m(h0) of hysteresis losses peak temperature for superconducting granuls. The steps at temperature scale depend on sample’s composition as well as on the type of atoms substituted for the copper. They range from 1 to 2 K for Y-based and about 5 K for Bi-based samples. Possible interpretation of the obtained results is presented.
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