Electrical resistivity and interference functions of amorphous NixAg1−x thin films

Using r.f. sputtering we have fabricated non-crystalline thin films of Ni Ag alloys, two metals which are insoluble in both liquid and solid states. The variation in resistivity with composition exhibits a maximum. The Faber-Ziman theory often used to explain both resistivity and temperature coefficient behaviours needs the measurement of interference functions. Comparison between the values of k at the maximum of the first peak and twice the Fermi wavevector k F leads to the determination of the effective number of conduction electrons in nickel (0.6), which agrees with previous results.