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Issue 102, 2016
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First-order reversal curve analysis of magnetoactive elastomers

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Abstract

The first magnetization loop and the first stress–strain cycle of magnetoactive elastomers (MAEs) in a magnetic field differ considerably from the following loops and cycles, possibly due to the internal restructuring of the magnetic filler particles and the matrix polymer chains. In the present study, the irreversible magnetization processes during the first magnetization of MAEs with different filler compositions and tensile moduli of the matrix are studied by first-order reversal curve (FORC) measurements. For MAEs with mixed magnetic NdFeB/Fe fillers the FORC distributions and magnetization distributions of the first major loop reveal a complex irreversible magnetization behavior at interaction fields Hu < −50 kA m−1 due to the magnetostatic coupling between the magnetically hard NdFeB and the magnetically soft Fe particles. This coupling is enhanced either if the interparticle distance is reduced by particle motion and restructuring or by an increase in the particle densities. If the stiffness of the matrix is increased, the structuring and thus the interparticle interactions are suppressed and the magnetization reversal is dominated by domain processes in the NdFeB particles at high coercive fields of Hc > 600 kA m−1.

Graphical abstract: First-order reversal curve analysis of magnetoactive elastomers

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Publication details

The article was received on 20 Sep 2016, accepted on 13 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA23435F
Citation: RSC Adv., 2016,6, 100407-100416
  • Open access: Creative Commons BY license
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    First-order reversal curve analysis of magnetoactive elastomers

    Julia M. Linke, D. Yu. Borin and S. Odenbach, RSC Adv., 2016, 6, 100407
    DOI: 10.1039/C6RA23435F

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