Magnetic State and Phase Composition of Co3C Nanoparticles

• Published in: Physics of metals and metallography Vol. 120; no. 10; pp. 930 - 935
• Main Authors: Mikhalev, K. N., Germov, A. Yu, Medvedev, E. Yu, Gerashchenko, A. P., Ermakov, A. E., Uimin, M. A., Novikov, S. I., D’yachkova, T. V., Tyutyunnik, A. P., Zainulin, Yu. G.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-10-2019; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Curie temperature; Electric fields; Electrical and Magnetic Properties; Ferromagnetism; Hyperfine structure; Magnetism; Materials Science; Metallic Materials; Nanoparticles; NMR; Nuclear magnetic resonance; Phase composition; Solid phase synthesis; Solid phases; Tensors; carbides; magnetization; magnetic nanoparticles; nuclear magnetic resonance
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X19100090

Nanoparticles Co
3
C were prepared using solid-phase synthesis under high pressure. The phase composition of the nanoparticles has been analyzed; the magnetization has been measured and
59
Со NMR spectra in a local field have been recorded. It is shown that Co
3
C 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.