Anisotropic effects in the magnetoelastic damping of electrolytic nickel in a direct magnetic field

In the present work a quantitative study of the dependence of the e.m.f. U_W induced in a search coil which surrounds a ferromagnetic sample performing torsional oscillations at a constant amplitude on the amplitude and the frequency of the oscillations is made. The dependence of U_W on the intensity of the longitudinal magnetic field H is also studied. On the basis of these studies experimental arguments are presented for the existence of magnetoelastic hysteresis and macro-currents. A supplementary mechanism through which the energy of the vibrating system can be dissipated is also presented.