Magnetoresistivity of hydrogen-doped Zr2(3d) metallic glasses

Magnetoresistivity of (Zr2(3d))1 − xHx metallic glasses (where 3d stands for Fe and Co atoms) was investigated as a function of hydrogen doping (x) in the temperature range from 100 K down to 5 K. Obtained magnetoresistivity is always positive due to the strong spin-orbit interaction and well described in the terms of exchange-enhanced spin-splitting contributions to the usual weak-localization term. (Zr2Fe)1 − xHx exhibits a significantly stronger magnetoresistivity than (Zr2Co)1 − xHx for all measured temperatures and doping levels, which is attributed to the increase in the inelastic spin-scattering rate (τin− 1) and the Stoner factor (1 − I)− 1. The magnetoresistivity of (Zr2(3d))1 − xHx exhibits a simple B2 behavior at higher temperatures, providing the information on τin− 1, and a more complex behavior at low temperatures, which gives the information on the spin-orbit scattering rate (τso− 1). It was found that the increase in the doping level reduces τso− 1, indicating hybridization of hydrogen s-electrons with Zr d-electrons and thus reducing the spin-orbit interaction.