Crystal Structure, Phase State, and Magnetoresistive Properties of Nanostructured Thin-Film Systems Based on Permalloy and Noble Metals

Abstract

We review and analyse the literature data on the experimental results dealing with the crystal structure, phase state, and magnetoresistive properties of nanostructured thin-film systems based on NixFe1–x permalloy and noble metals prepared by the methods of co-evaporation and layer-by-layer condensation. As shown, regardless of preparation methods, the phase state of systems stays as two-phase one. Upon high-temperature annealing, the formation of solid solutions is possible. As shown, in the case of applying of layer-by-layer condensation method, the value of the magnetoresistive effect depends on the thickness of the magnetic and nonmagnetic layers. In the case of applying the co-evaporation method, the determining parameters are the concentrations of the components and the total thickness of the system. The annealing-temperature effect on magnetoresistive properties of nanostructured thin-film systems based on permalloy and noble metals is analysed.

Keywords

• permalloy
• noble metal
• crystal structure
• phase state
• magnetoresistance
• concentration effect
• temperature effect