Structure and magnetism of new rare-earth-free intermetallic compounds: Fe3+xCo3-xTi2 (0 ≤ x ≤ 3)
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- Univ. of Nebraska, Lincoln, NE (United States)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Iowa State Univ., Ames, IA (United States); Chinese Academy of Sciences, Hefei (People's Republic of China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Here, 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725; AC02-07CH11358
- OSTI ID:
- 1334479
- Alternate ID(s):
- OSTI ID: 1347743
- Report Number(s):
- IS-J-9182; AMPADS; KC0402010; ERKCSNX
- Journal Information:
- APL Materials, Vol. 4, Issue 11; ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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