The Influence of a Magnetic Field on the Elastic
and Viscous Properties of Magnetoelastics

L. V. Nikitin*¹, L. S. Mironova*, G. V. Stepanov**, and A. N. Samus’*

* Faculty of Physics, Moscow State University,
Vorob’evy gory, Moscow, 119899 Russia

** State Research Institute of Chemistry and Technology of Organoelement Compounds,
sh. Entuziastov 38, Moscow, 111123 Russia

Received July 12, 2000;
Revised Manuscript Received November 23, 2000

Abstract—The effect of a uniform magnetic field on the viscous and elastic properties of new, rubber-elastic,
magnetically guided polymeric materials (magnetoelastics) capable of substantial deformation in an external
magnetic field was studied. It was found that the application of a magnetic field leads to a considerable rise in
the Young modulus and in the viscosity coefficient of these materials. A model is proposed which describes the
effect of magnetic field on the elasticity parameters. Based on the obtained experimental data, the influence of
an external magnetic field and a magnetoelastic-stretching force F on the volume fraction of polymer regions
contracted by interaction of magnetic particles is considered in terms of the proposed theoretical model.

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