Dynamic magnetic hysteresis in a liquid suspension of acicular maghemite particles--颗粒学报PARTICUOLOGY

Kashevsky, B. E., Kashevsky, S. B., & Prokhorov, I. V. (2009). Dynamic magnetic hysteresis in a liquid suspension of acicular maghemite particles. Particuology, 7(6), 451–458. https://doi.org/10.1016/j.partic.2009.09.002

Dynamic magnetic hysteresis in a liquid suspension of acicular maghemite particles

Bronislav E. Kashevsky^*, Sergey B. Kashevsky, Igor V. Prokhorov

A.V. Luikov Heat and Mass Transfer Institute, Belarus Academy of Sciences, P. Brovka str., 15, Minsk 220072, Belarus

10.1016/j.partic.2009.09.002

Volume 7, Issue 6, December 2009, Pages 451-458

Received 24 February 2009, Revised 1 July 2009, Accepted 15 September 2009, Available online 14 October 2009.

E-mail: bekas@itmo.by

Highlights

Abstract

This paper presents theoretical and experimental studies on the magnetodynamics and energy absorption in a dilute suspension of small ferromagnetic particles with magnetic hysteresis and mechanical mobility in an AC magnetic field. Experiments with 0.1% suspensions of acicular particles of gamma ferric oxide in solid and liquid matrices, subjected to a 430 Hz magnetic field with an intensity of up to 1200 Oe, revealed important role of particle mobility. The main qualitative and quantitative features of the phenomenon are in agreement with a model of joint magneto-mechanical dynamics of particles with a chain-of-spheres mode of incoherent magnetic reversal.

Graphical abstract

Keywords

High-coercive magnetic particles; Magnetic suspensions; Dynamic magnetic hysteresis

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