Low-temperature transport properties of Nb1-xTax thin films

Detailed measurements of the transverse magnetoresistance of disordered Nb1 -xTax thin flms were performed above the transition temperature T-c as a fu nction of temperature and magnetic field. The temperature dependence of the observed magnetoresistance is interpreted in terms of weak localization an d superconducting fluctuations. Besides the weak localization, the Aslamazo v-Larkin and the Maki-Thompson-Larkin fluctuations processes were included into the fitting procedure. Values of Larkin electron-electron interaction strength parameter beta(L)(T) and the total phase-breaking rate tau(phi)(-1 ) were obtained from the magnetoresistance fits.