WSEAS Transactions on Systems and Control

Print ISSN: 1991-8763
E-ISSN: 2224-2856

Volume 12, 2017

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

Volume 12, 2017

Study of Ferromagnetic Dispersed Samples and Particles Magnetic Susceptibility by Faraday Method (Magnetometer with Polar Hemispheres)

AUTHORS: Sandulyak Anna, Sandulyak Daria, Ershova Vera, Sandulyak Alexander, Polismakova Maria

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ABSTRACT: To study the magnetic susceptibility of samples (in particular, dispersed ones), a Faraday magnetometer version with pole-hemispherical tips is preferred. The approach to identification of the gradient stability zone (for positioning small samples) is shown: by the obtained coordinate characteristic of induction (meandering, with the possibility of an objective linear approximation of its section in the vicinity of the inflection) and the coordinate characteristic of the gradient – with stable gradient values in the vicinity of the extremum. Experimental data on the magnetic susceptibility of dispersed samples containing a dispersed phase of magnetite particles revealed a nonlinear character of the dependence of their susceptibility on the volume fraction of this phase – with an almost linear initial section. The possibility of obtaining information on the susceptibility of the particles themselves using data for this region is discussed, in the range of a volume fraction up to 0.2, and to increase the accuracy of such information to 0.02-0.05 (narrowed range), where the concentration dependences of the susceptibility of dispersed samples obey an independent linear trend.

KEYWORDS: Faraday magnetometer, magnetic susceptibility, gradient extremum zone, dispersed sample, volume fraction of ferroparticles.


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WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 12, 2017, Art. #40, pp. 374-385

Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0

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