Magnetic order of FeMn alloy on the W(001) surface

TL;DR

This paper theoretically investigates the magnetic ground states and phase transitions of FeMn alloy monolayers on W(001) surfaces, analyzing the stability of various magnetic configurations and the impact of disorder.

Contribution

It introduces a combined tight-binding and CPA approach to study magnetic order and disorder effects in surface FeMn alloys, providing insights into phase transition concentrations.

Findings

Identification of stable magnetic configurations for FeMn on W(001)

Estimation of concentration thresholds for magnetic phase transitions

Analysis of disorder effects on magnetic ordering

Abstract

We investigate theoretically the ground state of the FeMn binary alloy monolayer on the W(001) surface, the stability of different magnetic configurations (ferro/antiferromagnetic, disordered local moments, etc.) and estimate concentrations at which a transition occurs between different magnetic orders. The tight-binding linear muffin-tin orbital method combined with the coherent potential approximation is used to treat the surface alloy appropriately. We discuss the role of disorder on the phase transitions in surface alloys composed from two different 3d transition metals.