Nano-scale metal multilayers produced by repeated press-rolling

Abstract

Multilayer structured alloys which have a layer thickness less than 10 nm have been produced by the application of repeated pressing and rolling to the initially macroscopically thick layered sample. The TEM observation of a Ag/Fe sample revealed a regular alternate lamination of Ag and Fe with the layer thickness in the range of 10 nm. The measured electrical resistivity showed a large dependence on the applied magnetic field which is characteristic to the composite structure of magnetic and non-magnetic metals in the thickness range of nanometers.

Key Words:

• Mechanical alloying
• Nano-structure
• Multilayer
• Giant magnetoresistance
• Chaos
• Rolling