Abstract
This research is dedicated to the specifics of the behavior exhibited by elastomer filled with magnetically hard (high-coercivity) particles influenced by magnetic fields. Composite materials of this type are also mentioned as magnetorheological, magnetoactive, and hybrid. There have been done studies on the magnetization processes taking place in ME’s containing magnetically hard spherical NdFeB-alloy particles. As was found out, the coercivity exhibited by a sample can be significantly weaker in comparison to that demonstrated by the filler in pure form. It was also discovered that the coercivity may have negative values in positive magnetic fields. These effects are determined by the magnitude relation of the remnant magnetization of the sample, elasticity of the polymer matrix, strength of the external magnetic field, and the capability of magnetic particles to turn inside the polymer matrix as the magnetic field changes polarity to opposite.
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