Ferromagnetism of Iron-copper Nanocomposites

Автор(ы) S.L. Revo, T.G. Avramenko, T.V. Volkova, P.O. Galagan, K.O. Ivanenko, S.M. Naumenko

Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska St., 01601 Kyiv, Ukraine

Е-mail s_revo@i.ua
Выпуск Том 11, Год 2019, Номер 4
Даты Получено 07 апреля 2019; в отредактированной форме 04 августа 2019; опубликовано online 22 августа 2019
Ссылка S.L. Revo, T.G. Avramenko, T.V. Volkova, et al., J. Nano- Electron. Phys. 11 No 4, 04035 (2019)
DOI https://doi.org/10.21272/jnep.11(4).04035
PACS Number(s) 61.43 Gt, 62.23. – c, 75.60.Ej, 81.20.Ev, 81.20.Wk
Ключевые слова Thin films (58) , Magnetic characteristics, Coercive force (2) , Layered nanocomposite materials, Structure (102) .

The magnetic characteristics of thin films in massive samples are considered and realized in present paper. Multilayer nanocomposite materials from both iron and copper powders, and iron powders with multilayer carbon nanotubes were obtained in two ways. The first method is that a mixture of heterogeneous metal powders with the size of 4-100 microns was rolled, sintered and compressed with a total 99% reduction. In a second method, the powders mixtures were previously treated in a planetary mill before sintering. It is shown that the microstructure of the samples obtained is, as a rule, layered. Due to deformation, in particular, rolling, the thickness of the layers can be reduced to nanoscale. The properties of such massive materials, despite the possible heterogeneity of the continuity of the layers during rolling to nanoscale thicknesses and their fragmentation into nanoflakes, are similar in most to the properties of thin films. The relation between the microstructure, which is determined by the method of processing the powders mixture, the thickness of the layers/scales and the coercive force of the obtained materials, is established. The optimal processing parameters are determined for the realization of practically attractive magnetic characteristics of such materials.

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