SUSCEPTIBILITY OF MAGNETODIELECTRICS WITHIN AN ELASTOMER MATRIX TO LENGTH CHANGES IN HETEROGENEOUS MAGNETIC-FIELD

It is known that a small magnetostriction of ferromagnetic materials c auses problems in some technical applications. The investigations desc ribed here allowed ferromagnetic materials with high susceptibility to deformations in the form of composites to be obtained. These composit es have the properties of magnetodielectrics and consist of ferromagne tic particles located in an elastomer matrix. Eight structures of thes e magnetodielectrics were selected. The parameters characterizing the susceptibility of magnetodielectrics to length changes in the heteroge neous magnetic field were defined. By using an isometric model, formul as allowing the calculation of the parmeters were derived. The exempla ry values of these parameters for selected structures were calculated and the results obtained are discussed below.