Structure and Magnetism of New Metastable Fe<sub>8</sub>Co<sub>8</sub>N<sub>2</sub> Compound

ORAL

Abstract

Recently, the discovery of new magnetic materials with high magnetocrystalline anisotropy K1, large saturation magnetic polarization Js, and high Curie Temperature Tc has been accelerated by efficient computational and non-equilibrium fabrication methods [1-4]. Guided by theoretical predictions [4], we have produced a new Fe8Co8N2 compound in the form of nanoparticles using a cluster-deposition method and characterized it by XRD, XPS, STEM, EDS and magnetometry measurements. The nanoparticles have a stoichiometry of about Fe8Co8N2 and exhibit a uniform elemental distribution of Fe, Co and N. A Rietveld refinement of XRD data shows that the new compound crystallizes in a tetragonal structure [space group I4/m (87), a = 6.188 Å and c = 5.669 Å]. Fe8Co8N2 exhibits appreciable magnetic properties, K1 = 16 Mergs/cm3, Js = 17.6 kG, and Tc = 650 K, which are promising for a wide range of applications including information and energy processing.
References
[1] B. Balasubramanian et al. Nanoscale, 10, 13011 (2018).
[2] H. Wang et al. Phys. Rev. Mater. 3, 064403 (2019).
[3] X. Zhao et al. Phys. Rev. Lett, 112, 045502 (2014).
[4] X. Zhao et al. Phys. Rev. B, 94, 224424 (2016).

*This research is supported by the NSF-DMREF: SusChEM (1729288), NSF-NNCI (1542182), and NCMN-NRI

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Presenters

  • David Sellmyer

    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska
    • Physics and Astronomy, University of Nebraska, Lincoln
    • Department of Physics and Astronomy, NCMN, University of Nebraska - Lincoln 68588-0299, USA

Authors

  • Balamurugan Balasubramanian

    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska
    • Physics and Astronomy, University of Nebraska, Lincoln
    • Department of Physics and Astronomy, NCMN, University of Nebraska - Lincoln 68588-0299, USA

  • Rabindra Pahari

    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska

  • Shah Valloppilly

    • Nebraska Center for Materials and Nanoscience, University of Nebraska

  • Xingzhong Li

    • Nebraska Center for Materials and Nanoscience, University of Nebraska

  • Ralph Skomski

    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska
    • University of Nebraska
    • Physics and Astronomy, University of Nebraska, Lincoln
    • Department of Physics and Astronomy, NCMN, University of Nebraska - Lincoln 68588-0299, USA

  • Xiaoshan Xu

    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska
    • Department of Physics and Astronomy, University of Nebraska - Lincoln
    • Physics & Astronomy, University of Nebraska-Lincoln
    • Department of Physics and Astronomy, University of Nebraska

  • Cai-Zhuang Wang

    • Ames Laboratory
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University
    • Department of Physics and Astronomy, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Kai-Ming Ho

    • Iowa State University
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University
    • Department of Physics and Astronomy, Iowa State University
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • David Sellmyer

    • Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska
    • Physics and Astronomy, University of Nebraska, Lincoln
    • Department of Physics and Astronomy, NCMN, University of Nebraska - Lincoln 68588-0299, USA