Abstract
Inelastic neutron-scattering experiments on an amorphous Fe 86Co 4Zr 10 Invar alloy have been performed. It was observed that the generalized phonon density of states in the low-energy region becomes soft below the Curie temperature. This result is quite similar to the phonon softening of the crystalline Invar alloy, indicating that low-energy phonon softening is a common feature of Invar alloys. In addition, it is suggested that the electrical resistivity minimum near the Curie temperature may be attributed to the extra electron—phonon scattering contribution.
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