Paramagnetic Effect in Superconductors. VI. Resistance Transitions in Indium Wires

The resistance of indium wires from 0.04 to 2 mm in diameter has been measured as a function of the current, in the temperature region 2.9 to 4.2^∘{}K. The samples had residual resistance ratios r₀=R_0^∘KR_0^∘C of 2 to 7×{}10^-4. For all samples, the transition curves measured showed a steep rise with a break at the critical current. The ratio of critical resistance to the normal resistance is examined as a function of temperature, electronic mean free path and sample diameter. Corrections are made for the temperature and magnetic-field dependence of the resistivity.