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

APL Materials (Nov 2016)

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

Affiliations

Balamurugan Balasubramanian: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Bhaskar Das: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Manh Cuong Nguyen: Ames Laboratory, US Department of Energy, Ames, Iowa 50011, USA
Xiaoshan Xu: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Jie Zhang: Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
Xiaozhe Zhang: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Yaohua Liu: Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
Ashfia Huq: Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
Shah R. Valloppilly: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Yunlong Jin: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Cai-Zhuang Wang: Ames Laboratory, US Department of Energy, Ames, Iowa 50011, USA
Kai-Ming Ho: Ames Laboratory, US Department of Energy, Ames, Iowa 50011, USA
David J. Sellmyer: Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA

DOI: https://doi.org/10.1063/1.4968517
Journal volume & issue: Vol. 4, no. 11
pp. 116109 – 116109-7

Abstract

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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.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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