Abnormal growth of dynamic susceptibility of magnetic fluid in strong fields

Authors

  • Александр Владимирович Лебедев (Aleksandr Lebedev) Institute of Continuous Media Mechanics UB RAS

DOI:

https://doi.org/10.17072/1994-3598-2018-2-28-34

Keywords:

магнитная жидкость, динамическая восприимчивость, диаграмма Коул–Коула

Abstract

A magnetic fluid containing a large proportion of coarse particles was centrifuged into two fractions. The dynamic susceptibility of the obtained samples on the fundamental harmonic was measured as a function of particle concentration, frequency, and amplitude of the alternating magnetic field. It is found that for the heavy fraction, the modulus of dynamic susceptibility increases with increasing field amplitude at frequencies above the critical one. In an extremely concentrated sample, an increase in the susceptibility was recorded 1.6 times. The change in susceptibility depends essentially on the concentration of the liquid and is practically independent of temperature. A slight influence on the growth of susceptibility is due to the crystallization of the carrier medium.

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Published

2018-07-13

How to Cite

Лебедев (Aleksandr Lebedev) А. В. (2018). Abnormal growth of dynamic susceptibility of magnetic fluid in strong fields. Bulletin of Perm University. Physics, (2(40). https://doi.org/10.17072/1994-3598-2018-2-28-34

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Section

Regular articles

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