Phase stability analysis in Fe-Pt and Co-Pt alloy systems: An augmented space study

TL;DR

This paper investigates phase stability in Fe-Pt and Co-Pt alloys using an advanced computational approach that incorporates magnetic effects, successfully matching experimental observations.

Contribution

It introduces a generalized augmented space recursion method that accounts for magnetic effects in phase stability analysis of alloy systems.

Findings

Successfully reproduces experimental phase stability trends

Extends previous techniques to include magnetic effects

Provides insights into magnetic transition influences on alloy stability

Abstract

We have studied the problem of phase stability in Fe-Pt and Co-Pt alloy systems. We have used the orbital peeling technique in the conjunction of augmented space recursion based on the tight binding linear orbital method as the method for the calculation of pair interaction energies. In particular, we have generalized our earlier technique to take into account of magnetic effects for the cases where the magnetic transition is higher than the order disorder chemical transition temperature as in the case of Co$_3$Pt. Our theoretical results obtained within this framework successfully reproduce the experimentally observed trends.