Abstract
The magnetic properties of hybrid magnetic elastomers (HME) featuring a type of magnetorheological elastomer filled with high-coercivity (a.k.a. magnetically hard) particles have been studied. Introduction of magnetically hard components into the formula significantly modifies both magnetic and rheological parameters of the composite. An additional factor having an influence on the overall behavior of the elastomer is based on the properties of the powder used as filler determined by its dispersion degree. Impregnation of the polymer matrix with a magnetically hard powder leads to a complex relationship between the magnetization and elasticity of the material and magnetic field as compared to the behavior demonstrated by composites based on magnetically soft filler, which is determined by the rotational motion of the particles inside the sample. Such a material exhibits asymmetrical magnetization hysteresis loops.
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