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Structure and magnetism of new rare-earth-free intermetallic compounds: Fe3+xCo3−xTi2 (0 ≤ x ≤ 3)

Authors :
Balamurugan Balasubramanian
Bhaskar Das
Manh Cuong Nguyen
Xiaoshan Xu
Jie Zhang
Xiaozhe Zhang
Yaohua Liu
Ashfia Huq
Shah R. Valloppilly
Yunlong Jin
Cai-Zhuang Wang
Kai-Ming Ho
David J. Sellmyer
Source :
APL Materials, Vol 4, Iss 11, Pp 116109-116109-7 (2016)
Publication Year :
2016
Publisher :
AIP Publishing LLC, 2016.

Abstract

We report the fabrication of a set of new rare-earth-free magnetic compounds, which form the Fe3Co3Ti2-type hexagonal structure with P-6m2 symmetry. Neutron powder diffraction shows a significant Fe/Co anti-site mixing in the Fe3Co3Ti2 structure, which has a strong effect on the magnetocrystalline anisotropy as revealed by first-principle calculations. Increasing substitution of Fe atoms for Co in the Fe3Co3Ti2 lattice leads to the formation of Fe4Co2Ti2, Fe5CoTi, and Fe6Ti2 with significantly improved permanent-magnet properties. A high magnetic anisotropy (13.0 Mergs/cm3) and saturation magnetic polarization (11.4 kG) are achieved at 10 K by altering the atomic arrangements and decreasing Fe/Co occupancy disorder.

Details

Language :
English
ISSN :
2166532X
Volume :
4
Issue :
11
Database :
Directory of Open Access Journals
Journal :
APL Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.16c3f7c257c94d58925ba8eea5262d41
Document Type :
article
Full Text :
https://doi.org/10.1063/1.4968517