Magnetization of Paraffin-Based Magnetic Nanocolloids
- Authors: Dikanskii Y.I.1, Ispiryan A.G.1, Kunikin S.A.1, Radionov A.V.1
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Affiliations:
- North-Caucasus Federal University
- Issue: Vol 63, No 1 (2018)
- Pages: 57-61
- Section: Solid State Electronics
- URL: https://journals.rcsi.science/1063-7842/article/view/200506
- DOI: https://doi.org/10.1134/S1063784218010103
- ID: 200506
Cite item
Abstract
Using paraffin-based magnetic nanocolloids as an example, the reasons for maxima in the temperature dependence of the magnetic susceptibility of magnetic colloids have been discussed. The behavior of these dependences in a wide temperature interval has been analyzed for colloids in solid and liquid states. It has been concluded that the maximum observed at the melting point of paraffin can be attributed to freezing Brownian degrees of freedom in magnetite coarse particles, the magnetic moment of which is intimately related to the solid matrix. The second main maximum, which arises in the solid state, is explained by the superparamagnetic-magnetically hard transition of most fine particles at lower temperatures. It has been noted that the flatness of this maximum results from the polydispersity of the magnetic nanoparticle ensemble.
About the authors
Yu. I. Dikanskii
North-Caucasus Federal University
Email: skunikin@yandex.ru
Russian Federation, ul. Pushkina 1, Stavropol, 353029
A. G. Ispiryan
North-Caucasus Federal University
Email: skunikin@yandex.ru
Russian Federation, ul. Pushkina 1, Stavropol, 353029
S. A. Kunikin
North-Caucasus Federal University
Author for correspondence.
Email: skunikin@yandex.ru
Russian Federation, ul. Pushkina 1, Stavropol, 353029
A. V. Radionov
North-Caucasus Federal University
Email: skunikin@yandex.ru
Russian Federation, ul. Pushkina 1, Stavropol, 353029