Local atomic configuration approach to the nonmonotonic concentration dependence of magnetic properties of Ni2Mn1+xZ1-x (Z = In, Sn, Sb) Heusler alloys

SCRIPTA MATERIALIA

卷:194

Article

Zaleski, Karol¹  Ekholm, Marcus²  Alling, Bjorn²  Abrikosov, Igor A.^2,3  Dubowik, Janusz⁴ 

[1] Adam Mickiewicz Univ, NanoBioMed Ctr, Ul Wszechnicy Piastowskiej 3, PL-61614 Poznan, Poland

[2] Linkoping Univ, Dept Phys Chem & Biol, S-58183 Linkoping, Sweden

[3] Natl Univ Sci & Technol MISIS, Mat Modeling & Dev Lab, Moscow 119049, Russia

[4] Polish Acad Sci, Inst Mol Phys, Ul Smoluchowskiego 17, PL-60179 Poznan, Poland

关键词: Heusler phases;    Ferromagnetic shape memory alloy;    Magnetic thin films;    Magnetic structure;    Ab initio calculation;   

DOI  :  10.1016/j.scriptamat.2020.113646

来源: Elsevier

【 摘 要 】

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 ferro-magnetic 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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free