ELECTRICAL-TRANSPORT IN TERNARY GLASSY ZR-2(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 syste matic decrease in superconducting transition temperature T-c, magnetic susceptibility chi and coefficient A? of linear conductivity variatio n Delta sigma proportional to T below 100 K (which measures the electr on-phonon interaction) in going from M = Ti towards M = Cu. A minimum of A and Delta T-c/Delta x (gradient of the change in the superconduct ing transition temperature with concentration of M) and maximum of Del ta chi for M = Cr and Mn can be associated with the appearance of the magnetic correlation in these alleys. The measurements of the magnetor esistivity in the field B up to 1.2 T and for different temperatures s how that the magnetoresistivity also increases when going from M = Cu towards hi = Ti; we can explain magnetoresistivity as a combination of the contributions of the electron localization and superconducting fl uctuations. Our results agree with measurements of UPS spectra and spe cific heat capacity for similar alloys. (C) 1997 Elsevier Science S.A.