Electrical resistivity and wave character of free electrons in amorphous and nanoglass Sc 75 Fe 25 .
Journal of physics. Condensed matter : an Institute of Physics journal(2018)
摘要
The residual electrical resistivity of metallic amorphous alloys, ρ , is typically in the range 50 µΩ cm < ρ < 310 µΩ cm corresponding to a mean free path of conduction electrons of order a few interatomic distances. In crystalline metals with low defect levels such as Cu however, the residual electrical resistivity is about ρ ≈ 1.54 × 10 µΩ cm, leading to extensive progression of free electrons through the crystalline material, of typically up to 4 × 10 nm. The relatively 'high' values for the electrical resistivity of distorted ScFe alloys are discussed here within the framework of the wave character of electrons. The present investigation of amorphous and nanoglass ScFe over the temperature range 1.9-320 K, focuses on clarification of the temperature dependence of the resistivity, ρ(T). These alloys systems, which show a range of behaviours for temperature dependent resistivity-including temperature independent residual resistivity, as well as positive and negative polarities for the slope dρ(T)/dT-are examined in detail.
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