Materials Today Communications, volume 27, pages 102382

Quantitative phase analysis of magnetic Fe@C nanoparticles

Publication type: Journal Article
Publication date: 2021-06-01
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Impact factor: 3.8
ISSN: 23524928
Materials Chemistry
General Materials Science
Mechanics of Materials
Abstract
• Combination of NMR and Mossbauer spectroscopy can provide quantitative information about magnetic iron nanoparticles. • Annealing of the Fe@C nanoparticles leads to redistribution of the phase composition, with preserving core-shell structure. • Nanoscale effect which consists in an increase of the hyperfine field in ferromagnetic single domain state is demonstrated. Substantial progress in the area of nanotechnology requires special quality of magnetic nanoparticles. Conventional methods of analysis are not always efficient to the study of nanoparticles. This paper is dedicated to the problem of quantitative analysis of the phase composition of ferromagnetic nanoparticles and the fundamental issue of transition to the single domain magnetic state. A comprehensive study of Fe@C nanoparticles has been carried out, including local 57 Fe NMR and Mössbauer spectroscopy methods. It has been found that the cores of nanoparticles contain phases of α-iron, iron carbides, ferromagnetic and paramagnetic phases of iron-carbon FeC x solid solutions. Annealing of the nanoparticles leads to a significant redistribution of the phase composition and leads to an increase in magnetization. Also, a nanoscale effect has been found. It consists in observation of two lines in NMR spectra corresponding to multidomain and single-domain state. The hyperfine fields obtained by NMR and Mössbauer spectroscopy methods are discussed.
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Germov A. Y. et al. Quantitative phase analysis of magnetic Fe@C nanoparticles // Materials Today Communications. 2021. Vol. 27. p. 102382.
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Germov A. Y., Prokopyev O. A., Mikhalev K. N., Goloborodskiy B. Yu., Uimin M. A., Yermakov A. E., Konev A., Minin A., Novikov S. I., Gaviko V. S., Murzakaev A. M., Mikhalev K., Uimin M., Novikov S., Gaviko V. Quantitative phase analysis of magnetic Fe@C nanoparticles // Materials Today Communications. 2021. Vol. 27. p. 102382.
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TY - JOUR
DO - 10.1016/j.mtcomm.2021.102382
UR - https://doi.org/10.1016%2Fj.mtcomm.2021.102382
TI - Quantitative phase analysis of magnetic Fe@C nanoparticles
T2 - Materials Today Communications
AU - Germov, A. Y.
AU - Prokopyev, Oleg A
AU - Mikhalev, Konstantin N
AU - Goloborodskiy, Boris Yu
AU - Uimin, Mikhail A
AU - Yermakov, Anatoliy E
AU - Konev, Aleksandr
AU - Minin, A.S.
AU - Novikov, Sergey I
AU - Gaviko, Vasiliy S.
AU - Murzakaev, Aidar M
AU - Mikhalev, Konstantin
AU - Uimin, M.A.
AU - Novikov, Sergey
AU - Gaviko, V.S
PY - 2021
DA - 2021/06/01 00:00:00
PB - Elsevier
SP - 102382
VL - 27
SN - 2352-4928
ER -
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@article{2021_Germov,
author = {A. Y. Germov and Oleg A Prokopyev and Konstantin N Mikhalev and Boris Yu Goloborodskiy and Mikhail A Uimin and Anatoliy E Yermakov and Aleksandr Konev and A.S. Minin and Sergey I Novikov and Vasiliy S. Gaviko and Aidar M Murzakaev and Konstantin Mikhalev and M.A. Uimin and Sergey Novikov and V.S Gaviko},
title = {Quantitative phase analysis of magnetic Fe@C nanoparticles},
journal = {Materials Today Communications},
year = {2021},
volume = {27},
publisher = {Elsevier},
month = {jun},
url = {https://doi.org/10.1016%2Fj.mtcomm.2021.102382},
pages = {102382},
doi = {10.1016/j.mtcomm.2021.102382}
}
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