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Zhurnal Tekhnicheskoi Fiziki, 2017, Volume 87, Issue 10, Pages 1532–1538
DOI: https://doi.org/10.21883/JTF.2017.10.44998.2149
(Mi jtf6105)
 

Physical science of materials

Formation of nickel magnetic nanoparticles and modification of nickel phthalocyanine matrix by sodium doping

N. A. Kolpachevaab, M. V. Avramenkoa, L. A. Avakyana, Ya. V. Zubavichusc, A. A. Mirzakhanyand, A. S. Manukyand, È. G. Sharoyand, L. A. Bugaeva

a Southern Federal University, Rostov-on-Don
b Don State Technical University, Rostov-on-Don
c National Research Centre "Kurchatov Institute", Moscow
d Institute for Physical Research NAS of Armenia, Ashtarak, Armenia
Abstract: Data for the vapor-phase doping (300°C) of nickel phthalocyanine (NiPc) by sodium taken in different concentrations (x), as well as structural analysis data for Na$_{x=0.2}$NiPc, Na$_{x=1}$NiPc, and Na$_{x=3}$NiPc samples, have been reported. The structure of the samples and their atomic configuration versus the doping level have been studied by transmission electron microscopy, Raman scattering, X-ray diffraction, X-ray absorption spectroscopy, and extended X-ray absorption fine structure (EXAFS) spectroscopy. The structural parameters of Ni–N, Ni–C, and Ni–Ni bonds have been determined, and it has been found that, at a low level of doping by sodium, local structural distortions are observed in some molecules of the NiPc matrix near nickel atoms. The fraction of these molecules grows as the doping level rises from $x$ = 0.2 to $x$ = 1.0. It has been shown that doping changes the oscillation mode of light atoms, which indicates a rise in the electron concentration on five- and six-membered rings. At a high level of sodium doping ($x$ = 3.0), nickel nanoparticles with a mean size of 20 nm and molecule decomposition products have been observed in the NiPc matrix. It has been found that the fraction of nickel atoms in the Na$_{x=3}$NiPc nanoparticles as estimated from EXAFS data is sufficient for the room-temperature magnetic properties of the samples to persist for a long time.
Received: 27.12.2016
English version:
Technical Physics, 2017, Volume 62, Issue 10, Pages 1538–1544
DOI: https://doi.org/10.1134/S1063784217100152
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: N. A. Kolpacheva, M. V. Avramenko, L. A. Avakyan, Ya. V. Zubavichus, A. A. Mirzakhanyan, A. S. Manukyan, È. G. Sharoyan, L. A. Bugaev, “Formation of nickel magnetic nanoparticles and modification of nickel phthalocyanine matrix by sodium doping”, Zhurnal Tekhnicheskoi Fiziki, 87:10 (2017), 1532–1538; Tech. Phys., 62:10 (2017), 1538–1544
Citation in format AMSBIB
\Bibitem{KolAvrAva17}
\by N.~A.~Kolpacheva, M.~V.~Avramenko, L.~A.~Avakyan, Ya.~V.~Zubavichus, A.~A.~Mirzakhanyan, A.~S.~Manukyan, \`E.~G.~Sharoyan, L.~A.~Bugaev
\paper Formation of nickel magnetic nanoparticles and modification of nickel phthalocyanine matrix by sodium doping
\jour Zhurnal Tekhnicheskoi Fiziki
\yr 2017
\vol 87
\issue 10
\pages 1532--1538
\mathnet{http://mi.mathnet.ru/jtf6105}
\crossref{https://doi.org/10.21883/JTF.2017.10.44998.2149}
\elib{https://elibrary.ru/item.asp?id=30067514}
\transl
\jour Tech. Phys.
\yr 2017
\vol 62
\issue 10
\pages 1538--1544
\crossref{https://doi.org/10.1134/S1063784217100152}
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