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

Abstract

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 $r_0=\frac{R_{0°\mathrm{K}}}{R_{0°\mathrm{C}}}$ of 2 to 7×${10}^{-4\mathrm{}}$. 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.