Publication Date

9-1-2019

Department

Ames Laboratory; Physics and Astronomy

Campus Units

Ames Laboratory, Physics and Astronomy

OSTI ID+

1572384

Report Number

IS-J 10051

DOI

10.1103/PhysRevB.100.104429

Journal Title

Physical Review B

Volume Number

100

Issue Number

10

First Page

104429

Abstract

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 FeNi1−xCox magnetic alloy formed by substitutional doping of the L10 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 FeNi1−xCox system by considering an interplay of the tetragonal distortion with electronic concentration and chemical anisotropy. In particular, we identify an ordered FeNi0.5Co0.5 system with MAE larger by a factor 4.5 from the L10 FeNi magnet.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Department of Energy Subject Categories

36 MATERIALS SCIENCE

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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