Low-temperature specific heat, ac susceptibility, and electrical resistivity of amorphous Fe90Zr10, Co90Zr10, and Co86Zr14 alloys

Abstract
The low‐temperature specific heat (CP) and magnetic susceptibility (χ) for the amorphous alloys Fe90Zr10, Co90Zr10, and Co86Zr14 are presented. A very large linear contribution to CP combined with a sharp decrease in χ below about 60 K show Fe90Zr10 to have spin‐glass or spin‐cluster glass behavior at low temperatures. The Co‐based alloys show no deviations from true ferromagnetic behavior at low temperatures. Values of the Debye temperature for all three alloys and the electronic density of states for the Co‐based alloys are obtained.

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