Coercivity of (Fe0.7Co0.3)2B Nanowire and Its Bonded Magnet

Xubo Liu; Ikenna C Nlebedim

doi:10.20944/preprints202406.1877.v1

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preprints.org > chemistry and materials science > materials science and technology > doi: 10.20944/preprints202406.1877.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Coercivity of (Fe0.7Co0.3)2B Nanowire and Its Bonded Magnet

Xubo Liu

^* and

Ikenna C Nlebedim

Version 1 : Received: 25 June 2024 / Approved: 26 June 2024 / Online: 26 June 2024 (14:25:05 CEST)

A peer-reviewed article of this Preprint also exists.

Liu, X.; Nlebedim, I.C. Coercivity of (Fe_0.7Co_0.3)₂B Nanowire and Its Bonded Magnet. Crystals 2024, 14, 624. Liu, X.; Nlebedim, I.C. Coercivity of (Fe0.7Co0.3)2B Nanowire and Its Bonded Magnet. Crystals 2024, 14, 624.

Abstract

Potential permanent magnet (Fe0.7Co0.3)2B has large saturation magnetization and high Curie temperature but a moderate magnetocrystalline anisotropy (MCA) and displays relatively low coercivity. One way to improve coercivity is to combine the contribution from magnetocrystalline- and magnetic shape anisotropy by preparing (Fe0.7Co0.3)2B nanowires. We study the effect of size, morphology, and surface defect on the hard magnetic properties of nanowires using micromagnetic simulation. The hard magnetic properties of (Fe0.7Co0.3)2B nanowire bonded magnet have been estimated, including the role of inter-wire magnetostatic interaction. By considering the existence of local reduction of MCA energy up to 30% on the surface layer of nanowires, the anisotropic bonded magnet with 65% vol. of (Fe0.7Co0.3)2B nanowires displays typical magnetic properties of remanence Br=8.4 kG, coercivity Hci=9.9 kOe, and maximum energy product (BH)m=17.8 MGOe. Developing effective technology for synthesizing nanowires and fabricating corresponding bonded magnets is promising for manufacturing practical magnets based on magnetic phase with relatively low or moderate MCA, such as (Fe0.7Co0.3)2B.

Keywords

magnetic anisotropy; coercivity; micromagnetic simulation; nanowire; Fe-Co-B

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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