Impact of Co and Fe Doping on the Martensitic Transformation and the Magnetic Properties in Ni-Mn-Based Heusler Alloys

被引：14
作者：
Dutta, Biswanath [1 ]
Koermann, Fritz [1 ]
Hickel, Tilmann [1 ]
Neugebauer, Joerg [1 ]
机构：
[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2018年 / 255卷 / 02期
关键词：
density functional theory; Heusler alloys; magnetic exchange parameter; martensitic transformation; SHAPE-MEMORY ALLOYS; MAGNETOCALORIC MATERIALS; PHASE-TRANSITIONS; POTENTIAL MODEL; APPROXIMATION; MAGNETORESISTANCE; REFRIGERANTS; RIBBONS; METALS;
D O I：
10.1002/pssb.201700455
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Doping with Co and Fe is a promising strategy to enhance the performance of Ni-Mn-based magnetocaloric materials. We investigate here the impact of these two elements on the magnetic properties and the martensitic transformations in Mn-rich Ni-Mn-Al Heusler alloy. Based on ab initio ground-state energies, we explain the martensitic transformation temperatures in these alloys. The magnetic ground states of the austenite and the martensite phases are discussed on the basis of magnetic exchange parameters. A thorough comparison of the transition temperatures and the change in saturation moments during martensitic transformation brings into light the relative potential of the two substitutional elements for future applications.
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页数：7
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