Local atomic configuration approach to the nonmonotonic concentration dependence of magnetic properties of Ni2Mn1+xZ1−x (Z = In, Sn, Sb) Heusler alloys. (15th March 2021)

• Record Type: Journal Article
• Authors: Załęski, Karol; Ekholm, Marcus; Alling, Björn; Abrikosov, Igor A.; Dubowik, Janusz
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Heusler phases -- Ferromagnetic shape memory alloy -- Magnetic thin films -- Magnetic structure -- Ab initio calculation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.113646
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: The Ni 2 Mn 1 + x Z 1 − x Heusler alloys, where Z = In, Sn, Sb are attractive candidates for shape memory applications. The effect is directly related to their magnetic properties. We have studied these systems by ab-initio calculations and experiments, focusing on magnetic moments and exchange-bias fields. The calculations indicate that the composition dependence of the total magnetic moment is due to competing ferromagnetic and antiferromagnetic alignment between Mn atoms on different sublattices and with different local environments. This phenomenon can also explain the composition dependence of the exchange-bias effect.