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Temperature blocking and magnetization of magnetoactive elastomers

  • The magnetization of a magnetoactive elastomer (MAE) with microparticles of soft magnetic carbonyl iron embedded in a highly elastic matrix has been studied. It is shown that at high temperatures its magnetization curve has the form of a specific hysteresis loop. This hysteresis is attributed to the influence of displacement of magnetized particles in the elastically soft elastomer matrix under the effect of magnetic forces, leading to the change of magnetic interaction between the particles. In this case, there is a maximum in the field dependence of the magnetic susceptibility, the occurrence of which has been associated with the competition between rearrangement of particles, when they are displaced in a magnetic field, and saturation of particles' magnetization. When the MAE is cooled below approximately 225 K, both the magnetic hysteresis and the maximum in the field dependence of the magnetic susceptibility disappear. When the MAE material is cooled below the solidification temperature of the elastomer matrix, the displacements of the magnetic particles during magnetization are blocked by the rigid matrix. The magnetization reversal of the MAE is reversible. This means that the shape of subsequent magnetization loops remains constant and the sample returns into the initial non-magnetized state after the magnetic field is turned off.

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Metadaten
Author:Andrii V. BodnarukORCiD, Viktor M. KalitaORCiD, Mykola M. KulykORCiD, Albert F. LozenkoORCiD, Sergey M. RyabchenkoORCiD, Andrei A. SnarskiiORCiD, Alexander Brunhuber, Mikhail Shamonin (Chamonine)ORCiDGND
DOI:https://doi.org/10.1016/j.jmmm.2018.10.005
Parent Title (English):Journal of Magnetism and Magnetic Materials
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2019
Release Date:2022/01/31
Tag:Hysteresis loop; MICROSTRUCTURE; Magnetization reversal; Magnetorheological elastomers; Solidification; magnetoactive elastomer
Volume:471
Issue:February
First Page:464
Last Page:467
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Labor Intelligente Materialien und Strukturen
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG