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Magnetic anisotropy in magnetoactive elastomers, enabled by matrix elasticity

  • Polydimethylsiloxane based magnetoactive elastomers demonstrate above the melting transition range (e.g. at room temperature) an induced uniaxial magnetic anisotropy, which grows with increasing magnetic field. By freezing a material down to 150 K, displaced iron microparticles are immobilized, so that the magnetic anisotropy can be measured. Magnetic anisotropy “constant” is a consequence of particle displacements and a characteristic of the energy of internal deformations in the polymer matrix. The maximum anisotropy constant of the filling is at least one order of magnitude larger than the shear modulus of the pure elastomer (matrix). In a magnetic field, the gain in the rigidity of the composite material is attributed to the magnetomechanical coupling, which is in turn a source of anisotropy. The concept of effective magnetic field felt by the magnetization allows one to explain the magnetization curve at room temperature from low-temperature measurements. The results can be useful for developing vibration absorbers and isolators.

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Metadaten
Author: Bodnaruk, Andrii V., Alexander Brunhuber, Viktor M. Kalita, Mykola M. KulykORCiD, Peter KurzweilORCiD, Andrei A. SnarskiiORCiD, Albert F. LozenkoORCiD, Sergey M. RyabchenkoORCiD, Mikhail Shamonin (Chamonine)ORCiDGND
DOI:https://doi.org/10.1016/j.polymer.2018.12.027
Parent Title (English):Polymer
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2019
Release Date:2022/01/31
Tag:Experimental methodology; Internal deformation; Magnetomechanical coupling; magnetic properties; magnetoactive elastomer; magnetorheological elastomer
Volume:162
Issue:January
First Page:63
Last Page:72
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