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

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

doi:10.1063/1.4968517

Structure and magnetism of new rare-earth-free intermetallic compounds: Fe_3+xCo_3-xTi₂(0 ≤ x ≤ 3)

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

Physics and Astronomy

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8 Scopus citations

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.

Original language	English (US)
Article number	116109
Journal	APL Materials
Volume	4
Issue number	11
DOIs	https://doi.org/10.1063/1.4968517
State	Published - Nov 1 2016

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)

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

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.",

author = "Balamurugan Balasubramanian and Bhaskar Das and Nguyen, {Manh Cuong} and Xiaoshan Xu and Jie Zhang and Xiaozhe Zhang and Yaohua Liu and Ashfia Huq and Valloppilly, {Shah R.} and Yunlong Jin and Wang, {Cai Zhuang} and Ho, {Kai Ming} and Sellmyer, {David J.}",

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doi = "10.1063/1.4968517",

language = "English (US)",

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T2 - Fe3+xCo3-xTi2(0 ≤ x ≤ 3)

AU - Balasubramanian, Balamurugan

AU - Das, Bhaskar

AU - Nguyen, Manh Cuong

AU - Xu, Xiaoshan

AU - Zhang, Jie

AU - Zhang, Xiaozhe

AU - Liu, Yaohua

AU - Huq, Ashfia

AU - Valloppilly, Shah R.

AU - Jin, Yunlong

AU - Wang, Cai Zhuang

AU - Ho, Kai Ming

AU - Sellmyer, David J.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - 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.

AB - 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.

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M1 - 116109

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Structure and magnetism of new rare-earth-free intermetallic compounds: Fe_3+xCo_3-xTi₂(0 ≤ x ≤ 3)

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