First-principles prediction of magnetic properties in Fe(Co,Ni)(C,N)0.5 alloys

Author:

Kota Yohei1ORCID,Sakuma Akimasa2

Affiliation:

1. National Institute of Technology, Fukushima College, Iwaki, Fukushima 970-8034, Japan

2. Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan

Abstract

To explore a candidate for rare-earth-free magnets, the effects of the light elements (C,N) addition on the magnetic properties in FeCo and FeNi ordered alloys were examined using first-principles calculations. Among Fe(Co,Ni)(C,N)0.5 alloys, we found that FeNiC0.5 is the most promising, because its uniaxial magnetic anisotropy constant [Formula: see text] is expected to be 3.0 MJ/m3 (five times [Formula: see text] of L10-type FeNi) and the increase in the Curie temperature [Formula: see text] by the addition of C was observed. The mechanism for the enhancement of [Formula: see text] and [Formula: see text] can be understood by the basic concepts of the physics of magnetism. Despite being nonmagnetic themselves, light elements have the potential to improve the fundamental properties of magnetic materials.

Funder

Japan Society for the Promotion of Science

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

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