Interfacial exchange interactions and magnetism of Ni2MnAl/Fe bilayers
Rocio Yanes, Eszter Simon, Sebastian Keller, Balazs Nagyfalusi, Sergii, Khmelevsky, Laszlo Szunyogh, Ulrich Nowak
TL;DR
This study uses multi-scale calculations to explore the magnetic properties of Ni2MnAl/Fe bilayers, revealing a small exchange bias effect and a method to control magnetic structures through spin-flop coupling.
Contribution
It introduces a combined ab-initio and spin dynamics approach to analyze magnetic interactions in Ni2MnAl/Fe bilayers and demonstrates control over magnetic structures via spin-flop coupling.
Findings
Small exchange bias in disordered B2 phase
Control of magnetic structure through spin-flop coupling
Effective multi-scale simulation approach
Abstract
Based on a multi-scale calculations, combining ab-initio methods with spin dynamics simulations, we perform a detailed study of the magnetic behavior of Ni2MnAl/Fe bilayers. Our simulations show that such a bilayer exhibits a small exchange bias effect when the Ni2MnAl Heusler alloy is in a disordered B2 phase. Additionally, we present an effective way to control the magnetic structure of the Ni2MnAl antiferromagnet, in the pseudo-ordered B2-I as well as the disordered B2 phases, via a spin-flop coupling to the Fe layer.
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