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Title: Concentration-tuned tetragonal strain in alloys: Application to magnetic anisotropy of $$\mathrm{FeNo}_{1-x}\mathrm{Co}_x$$

Abstract

In this paper, we explore an opportunity to induce and control tetragonal distortion in materials. The idea involves formation of a binary alloy from parent compounds having body-centered and face-centered symmetries. The concept is illustrated in the case of $$\mathrm{FeNo}_{1-x}\mathrm{Co}_x$$ magnetic alloy formed by substitutional doping of the $$L1_0$$ FeNi magnet with Co. Using electronic structure calculations we demonstrate that the tetragonal strain in this system can be controlled by concentration and it reaches maximum for $x = 0.5$. This finding is then applied to create a large magnetocrystalline anisotropy (MAE) in $$\mathrm{FeNo}_{1-x}\mathrm{Co}_x$$ system by considering an interplay of the tetragonal distortion with electronic concentration and chemical anisotropy. In particular, we identify an ordered $$\mathrm{FeNi_{0.5}Co_{0.5}}$$ system with MAE larger by a factor 4.5 from the $$L1_0$$ FeNi magnet.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2];  [1]
  1. Ames Lab., Ames, IA (United States)
  2. Univ. de Lorraine, Metz (France)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1572384
Alternate Identifier(s):
OSTI ID: 1564558
Report Number(s):
IS-J 10051
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 10; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wysocki, Aleksander L., Nguyen, Manh Cuong, Wang, Cai-Zhuang, Ho, Kai-Ming, Postnikov, Andrey V., and Antropov, Vladimir P. Concentration-tuned tetragonal strain in alloys: Application to magnetic anisotropy of $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.104429.
Wysocki, Aleksander L., Nguyen, Manh Cuong, Wang, Cai-Zhuang, Ho, Kai-Ming, Postnikov, Andrey V., & Antropov, Vladimir P. Concentration-tuned tetragonal strain in alloys: Application to magnetic anisotropy of $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$. United States. doi:10.1103/PhysRevB.100.104429.
Wysocki, Aleksander L., Nguyen, Manh Cuong, Wang, Cai-Zhuang, Ho, Kai-Ming, Postnikov, Andrey V., and Antropov, Vladimir P. Mon . "Concentration-tuned tetragonal strain in alloys: Application to magnetic anisotropy of $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$". United States. doi:10.1103/PhysRevB.100.104429.
@article{osti_1572384,
title = {Concentration-tuned tetragonal strain in alloys: Application to magnetic anisotropy of $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$},
author = {Wysocki, Aleksander L. and Nguyen, Manh Cuong and Wang, Cai-Zhuang and Ho, Kai-Ming and Postnikov, Andrey V. and Antropov, Vladimir P.},
abstractNote = {In this paper, we explore an opportunity to induce and control tetragonal distortion in materials. The idea involves formation of a binary alloy from parent compounds having body-centered and face-centered symmetries. The concept is illustrated in the case of $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$ magnetic alloy formed by substitutional doping of the $L1_0$ FeNi magnet with Co. Using electronic structure calculations we demonstrate that the tetragonal strain in this system can be controlled by concentration and it reaches maximum for $x = 0.5$. This finding is then applied to create a large magnetocrystalline anisotropy (MAE) in $\mathrm{FeNo}_{1-x}\mathrm{Co}_x$ system by considering an interplay of the tetragonal distortion with electronic concentration and chemical anisotropy. In particular, we identify an ordered $\mathrm{FeNi_{0.5}Co_{0.5}}$ system with MAE larger by a factor 4.5 from the $L1_0$ FeNi magnet.},
doi = {10.1103/PhysRevB.100.104429},
journal = {Physical Review B},
number = 10,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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