Magnetic and Transport Properties of Fe-Ag granular multilayers

TL;DR

This paper investigates the magnetic and transport behaviors of Fe-Ag granular multilayers, revealing strong magnetic scattering effects, a bimodal grain size distribution, and unusual transport features through comprehensive measurements.

Contribution

It provides a detailed quantitative analysis of the magnetic and transport properties of Fe-Ag granular multilayers, highlighting the impact of grain size distribution on their behavior.

Findings

Large negative magnetoresistance observed

Sublinear temperature dependence of resistance

Evidence of bimodal grain size distribution

Abstract

Results of magnetization, magnetotransport and Mossbauer spectroscopy measurements of sequentially evaporated Fe-Ag granular composites are presented. The strong magnetic scattering of the conduction electrons is reflected in the sublinear temperature dependence of the resistance and in the large negative magnetoresistance. The simultaneous analysis of the magnetic properties and the transport behavior suggests a bimodal grain size distribution. A detailed quantitative description of the unusual features observed in the transport properties is given.