Very high-resolution electrical resistivity data are presented here for (${\mathrm{Ni}}_{0.5}$${\mathrm{Zr}}_{0.5}$${)}_{1\mathrm{-}\mathrm{x}}$${\mathrm{Al}}_{\mathrm{x}}$ (with x=0, 0.05, 0.1, 0.15, 0.2) nonmagnetic amorphous metallic glasses in the temperature range 1.2–300 K. All the alloys fall into the strong scattering regime with negative temperature coefficient of resistance even until 300 K. In each specimen, we find three distinct regions, hitherto only theoretically predicted by quantum interference effects, where the conductivity varies in a sequence of $\sqrt{T}$, T, and $\sqrt{T}$ at low, intermediate, and high temperatures, respectively. Parameters estimated from this quantum correction analysis are in excellent agreement with those from earlier experiments on other amorphous systems.

• Received 22 August 1996

DOI:https://doi.org/10.1103/PhysRevB.55.5554