Compound*

Recently, the discovery of new magnetic materials with high magnetocrystalline anisotropy K₁, large saturation magnetic polarization J_s, and high Curie Temperature T_c 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, J_s = 17.6 kG, and T_c = 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).