Features of magnetic susceptibility of a ferrofluid with a non-magnetic filler

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We presented the results of an experimental study of the features of the magnetic susceptibility of a magnetic fluid with a non-magnetic filler. It is established that the dependence of magnetic susceptibility on the concentration of non-magnetic filler has features. The explanation of the detected effects is based on the assumption of the influence of surface forces on the relaxation processes of the magnetic moment of magnetic particles. It was also found that the dependences of the magnetic susceptibility of a magnetic fluid with a non-magnetic filler on the magnitude of the external magnetic field differ from similar dependences for a magnetic fluid without a filler.

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作者简介

Yu. Dikansky

North-Caucasus Federal University

Email: dgladkikh@ncfu.ru
俄罗斯联邦, Stavropol

D. Gladkikh

North-Caucasus Federal University

编辑信件的主要联系方式.
Email: gladkikhdv@mail.ru
俄罗斯联邦, Stavropol

D. Dorozhko

North-Caucasus Federal University

Email: gladkikhdv@mail.ru
俄罗斯联邦, Stavropol

A. Kurnev

North-Caucasus Federal University

Email: dgladkikh@ncfu.ru
俄罗斯联邦, Stavropol

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2. Fig. 1. Dependence of the magnetic susceptibility of the MF sample (φm0 = 14%) on the volume concentration of the non-magnetic filler: 1 — experiment, 2 — theoretical dependence (in accordance with formula (3)).

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3. Fig. 2. Dependence of the magnetic susceptibility of the sample on the concentration of the magnetic phase: 1 - experiment, 2 - theoretical dependence (in accordance with formula (2)).

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4. Fig. 3. Dependence of the magnetic susceptibility of MF on the external field strength at different volume concentrations of the non-magnetic filler: 1 — δ = 0 (MF without filler), 2 — δ = 0.25, 3 — δ = 0.4, 4 — δ = 0.5, 5 — δ = 0.57, 6 — δ = 0.625.

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