Hall effect in Zr-Ni and Zr-Cu metallic glasses doped with hydrogen

We have studied the effect of hydrogen doping on the Hall resistivity of paramagnetic ${\mathrm{Zr}}_{76}$${\mathrm{Ni}}_{24}$, ${\mathrm{Zr}}_{40}$${\mathrm{Ni}}_{60}$, ${\mathrm{Zr}}_{70}$${\mathrm{Cu}}_{30}$, and ${\mathrm{Zr}}_{60}$${\mathrm{Cu}}_{40}$ metallic glasses. All the alloys have positive Hall coefficients except the ${\mathrm{Zr}}_{40}$${\mathrm{Ni}}_{60}$. The hydrogen dopant increases the absolute value of the Hall coefficient irrespective of its sign, except in the case of (${\mathrm{Zr}}_{70}$${\mathrm{Cu}}_{30}$${)}_{1\mathrm{-}\mathit{x}}$${\mathrm{H}}_{\mathit{x}}$, where the Hall coefficient decreases for low hydrogen concentrations (x<0.04) and increases at higher ones, while staying positive all the time. The results are explained as being due to the enhanced s-d hybridization.