Nano-scaled multi-layered bulk materials manufactured by repeated pressing and rolling in the Cu–Fe system

The repeated application of mechanical deformation of metallic materials has been proved to be an effective technique for producing bulk nano-scaled regulated structures. These materials have been shown to have unique properties characteristic for nano-materials. This paper reports the experimental results on the mechanical strength, magneto-resistivity, and thermo-electricity obtained by repeated pressing and rolling of alternately stacked thin metallic foils in the Cu–Fe system. In the samples which have the layer thickness greater than 35 nm, the Hall–Petch relation is primarily obeyed. For the samples with the layer thickness less than 35 nm, the strength and hardness deviate from this relation. Large magneto-resistivity change (GMR) have been confirmed and a noted change in thermo-electricity (EMF) dependent on the layer thickness, as observed for the Ag–Fe system, have also been confirmed.