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

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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.

Original languageEnglish (US)
Article number116109
JournalAPL Materials
Volume4
Issue number11
DOIs
Publication statusPublished - Nov 1 2016

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ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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