Magnetism of sigma-phase Fe-Mo alloys: its revealing and characterization

TL;DR

This study investigates the low-temperature magnetic properties of sigma-phase Fe-Mo alloys using multiple techniques, revealing spin-glass behavior and magnetic transition temperatures that vary with composition.

Contribution

It provides new insights into the magnetic behavior of sigma-Fe-Mo alloys, specifically identifying spin-glass states and transition temperatures across different compositions.

Findings

Magnetic ordering temperature decreases with increasing Mo content.

Alloys exhibit spin-glass magnetic ground state.

Magnetic transition temperatures range from 46 K to 22 K.

Abstract

A low-temperature magnetism was revealed in a series of sigma-Fe(100-x)Mo(x) alloys (x=45-53). Its characterization has been done using vibrating sample magnetometry, M\"ossbauer spectroscopy, and ac magnetic susceptibility. The magnetic ordering temperature was determined to lie in the range of 46 K for x=45 and 22K for x=53, and the ground magnetic state was found to be typical of a spin-glass.