Thermal stability and electronic properties of amorphous Zr-Co and Zr-Ni alloys

Abstract

Amorphous Zr-Co and Zr-Ni alloys were prepared by melt spinning over a wide range of $3d$-metal concentrations (20%-90%). These alloys were investigated by x-ray diffraction and their crystallization temperatures were determined by differential scanning calorimetry. Magnetic and resistivity measurements were made in the range 4.2-300 K. Many of the amorphous alloys investigated were found to have a rather large electrical resistivity with a negative temperature coefficient. This property has been explained in terms of the extended Ziman theory of liquid metals. The significance of charge transfer in these alloys is discussed.