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American Institute of Physics, APL Materials, 11(4), p. 116109, 2016

DOI: 10.1063/1.4968517

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

Journal article published in 2016 by Balamurugan Balasubramanian, Bhaskar Das ORCID, Manh Cuong Nguyen ORCID, Xiaoshan Xu ORCID, Jie Zhang, Xiaozhe Zhang ORCID, Yaohua Liu ORCID, Ashfia Huq, Shah R. Valloppilly, Yunlong Jin, Cai-Zhuang Wang, Kai-Ming Ho, David J. Sellmyer
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.