Elastic properties of Fe-Mn random alloys studied by ab initio calculations

被引：96
作者：
Music, Denis
Takahashi, Tetsuya
Vitos, Levente
Asker, Christian
Abrikosov, Igor A.
Schneider, Jochen M.
机构：
[1] Rhein Westfal TH Aachen Univ, D-52074 Aachen, Germany
[2] Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden
[3] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary
[4] Uppsala Univ, Dept Phys, Condensed Matter Theory Grp, SE-75121 Uppsala, Sweden
[5] Linkoping Univ, IFM, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 19期
基金：
匈牙利科学研究基金会;
关键词：
D O I：
10.1063/1.2807677
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied the influence of the Mn content on the elastic properties of Fe-Mn random alloys (space group of Fm (3) over barm) using ab initio calculations. The magnetic effects in Fe-Mn alloys have a strong influence on the elastic properties, even above the Neel temperature. As the Mn content is increased from 5 to 40 at. %, the C-44 elastic constant is unaffected, while C-11 and C-12 decrease. This behavior can be understood based on the magnetovolume effect which softens the lattice. Since the amplitude of local magnetic moments is less sensitive to volume conserving distortions, the softening is not present during shearing.
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页数：3
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