Electrical transport in ternary glassy Zr2(Ni1 − xMx)1 alloys

The addition of a third transition element M (Ti, V, Cr, Mn, Fe, Co or Cu) to the amorphous Zr2Ni alloy causes, for fixed M content, a systematic decrease in superconducting transition temperature Tc, magnetic susceptibility χ and coefficient A of linear conductivity variation Δσ ∝ T below 100 K (which measures the electron-phonon interaction) in going from M = Ti towards M = Cu. A minimum of A and ΔTc/Δx (gradient of the change in the superconducting transition temperature with concentration of M) and maximum of δχ for M = Cr and Mn can be associated with the appearance of the magnetic correlation in these alloys. The measurements of the magnetoresistivity in the field B up to 1.2 T and for different temperatures show that the magnetoresistivity also increases when going from M = Cu towards M = Ti; we can explain magnetoresistivity as a combination of the contributions of the electron localization and superconducting fluctuations. Our results agree with measurements of UPS spectra and specific heat capacity for similar alloys.