Issues »  Volume 42, Issue 11

Magnetic Properties of Cu/Cu$_2$O Nanoparticles of ‘Nucleus–Shell’ Class Prepared by Electric-Spark Dispergation Method

А. О. Perеkоs$^{1}$, О. D. Rud$^{1}$, V. Z. Vоynash$^{1}$, А. V. Gіlchuk$^{2}$, М. О. Gоlyatkinа$^{2}$, V. V. Bоndаr$^{1}$, S. М. Kоnоplyuk$^{3}$, V. М. Kоlyesnik$^{1}$, Ye. Yu. Kanyukоv$^{4}$, М. А. Kаlаndа$^{4}$, S. Ye. Demyanov$^{4}$

$^{1}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
$^{3}$Institute of Magnetism under NAS and MES of Ukraine, 36b Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{4}$Scientific and Practical Materials Research Centre of NAS of Belarus, 19 P. Brovki Str., 220072 Minsk, Republic of Belarus

Received: 15.01.2020; final version - 12.06.2020. Download: PDF

The spherical Cu/Cu$_2$O nanoparticles of ‘nucleus–shell’ class with submicron sizes are fabricated by method of electrospark dispergation in distilled water. As shown, the produced nanoparticles at room temperature have ferromagnetic properties and values of its specific magnetization saturation are in interval from 0.1 to 3 G$\cdot$cm$^3$/g. As assumed, ferromagnetic properties of Cu/Cu$_2$O nanoparticles’ ensembles are connected with localized magnetic moments formation on interfaces between nucleuses of nanoparticles and their shells. Interaction of these localized magnetic moments and formation of total magnetic moments of separate nanoparticles with their following blocking by magnetic dipole-dipole interaction or by field of their magnetic anisotropy may leads to correlated orientation of nanoparticles’ magnetic moments and to creation of ferromagnetic state.

Key words: magnetic properties, electric-spark dispergation, nanoparticles of ‘nucleus–shell’ class, ferromagnetism.

URL: http://mfint.imp.kiev.ua/en/abstract/v42/i11/1481.html

DOI: https://doi.org/10.15407/mfint.42.11.1481

PACS: 61.05.cp, 61.43.Gt, 61.46.Hk, 75.20.-g, 75.50.Cc, 75.75.-c

Citation: А. О. Perеkоs, О. D. Rud, V. Z. Vоynash, А. V. Gіlchuk, М. О. Gоlyatkinа, V. V. Bоndаr, S. М. Kоnоplyuk, V. М. Kоlyesnik, Ye. Yu. Kanyukоv, М. А. Kаlаndа, and S. Ye. Demyanov, Magnetic Properties of Cu/Cu$_2$O Nanoparticles of ‘Nucleus–Shell’ Class Prepared by Electric-Spark Dispergation Method, Metallofiz. Noveishie Tekhnol., 42, No. 11: 1481—1497 (2020) (in Ukrainian)

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