Transport properties of hydrogen-doped (Zr_(80)Fe_(20))_(1-x)H_x metallic glasses

摘要

The electrical resistivities of hydrogen-doped (Zr_(80)Fe_(20))_(1-x)H_x metallic glasses have been measured at temperatures between 2 and 290 K and in magnetic fields to 1 T for various dopant concentrations (x = 0,k 0.017, 0.031, 0.071, 0.104). Zr_(80)Fe_(20) metallic glass has a high room-temperature resistivity (#rho# = 160 #mu##OMEGA# cm) and becomes superconducting at 3.28 K. The temperature and magnetic field dependence of the resistivity has been analyzed using theoretical models of weak-localization and electron-electron interaction in disordered three-dimensional conductors. Doping the samples with hydrogen increases disorder. In the Zr_(80)Fe_(20) system hydrogen reduces the effective electron diffusion constant. D, the electron density at the Fermi level, N(E_F), and the screening of the Coulomb interaction, F, leading to a decrease in conductivity and suppression of the superconucting transition temperature. The contribution of the Maki-Thompson interaction to the magnetoresistivity is also depressed.