https://doi.org/10.1140/epjs/s11734-025-02070-4
Regular Article
Overshoots of electrical resistivity of soft polymer composites
Ural Federal University, 620000, Ekaterinburg, Russia
Received:
25
May
2025
Accepted:
13
November
2025
Published online:
24
November
2025
The paper deals with theoretical study and explanations of recently observed overshoots of electrical resistance of soft magnetic elastomers after stepwise sample compression or decompression along the electrical current line. The explanation is based on the concept that the particles of the magnetic filler form percolating structures, which provide the macroscopic conductivity of the composite. On the microscopical level, this conductivity is provided by the tunnel current through the ultrathin polymer layers between the particles. As well known, the tunnel resistivity strongly depends on the interparticle distance. After the instantaneous mechanical impacts, both loading and disloading of the sample, the relative motion of the particles in the clusters first, provokes fast increase, and then relatively gradual decrease of the macroscopic resistivity.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
