Distribution of the upper critical field within the grains.
Resistive transition of a polycrystalline sample (“filament”) and of a single crystal . The applied current density was, in both specimens, about .
Zero resistivity field as a function of the upper critical field. The symbols refer to the experimental data and the line represents the expected behavior for and .
Resistive transition at before and after neutron irradiation.
Resistive transition of a wire before and after removing the conducting sheath.
Critical current densities of a bulk sample at and of two different wires at .
Critical current densities before and after neutron irradiation.
Influence of various parameters on . Only one parameter of the original data set (the dotted curve) is changed in each panel.
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