Magnetic State and Phase Composition of Co 3 C Nanoparticles

K. N. Mikhalev; A. Yu. Germov; E. Yu. Medvedev; A. P. Gerashchenko; A. E. Ermakov; M. A. Uimin; S. I. Novikov; T. V. D’yachkova; A. P. Tyutyunnik; Yu. G. Zainulin

doi:10.1134/S0031918X19100090

Magnetic State and Phase Composition of Co₃C Nanoparticles

Authors: Mikhalev K.N.¹, Germov A.Y.¹, Medvedev E.Y.¹, Gerashchenko A.P.¹, Ermakov A.E.¹, Uimin M.A.¹, Novikov S.I.¹, D’yachkova T.V.², Tyutyunnik A.P.², Zainulin Y.G.²
Affiliations:
1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
2. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Issue: Vol 120, No 10 (2019)
Pages: 930-935
Section: Electrical and Magnetic Properties
URL: https://journals.rcsi.science/0031-918X/article/view/168731
DOI: https://doi.org/10.1134/S0031918X19100090
ID: 168731

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Abstract

Nanoparticles Co₃C were prepared using solid-phase synthesis under high pressure. The phase composition of the nanoparticles has been analyzed; the magnetization has been measured and ⁵⁹Со NMR spectra in a local field have been recorded. It is shown that Co₃C is a ferromagnet with the Curie temperature T_C = 498(10) K. The hyperfine fields and components of electric field gradient tensor were determined for two nonequivalent Co positions in the carbide. The obtained hyperfine fields correspond to the spin state of Co ions S = 1.

Keywords

magnetization, nuclear magnetic resonance, carbides, magnetic nanoparticles

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Magnetic State and Phase Composition of Co3C Nanoparticles

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Magnetic State and Phase Composition of Co₃C Nanoparticles