“Giant” ΔE-Effect and Magnetomechanical Damping in Amorphous Ferromagnetic Ribbons

Abstract

The influence of the magnetic field and the strain amplitude on the “giant” ΔE-effect and associated magnetomechanical damping is studied in amorphous ferromagnetic ribbons. Measurements are done at room temperature at frequencies between 100 and 300 Hz within the range of strain amplitudes from 10−6 to 10−4 and magnetic fields up to ≈ 1 × 104 A/m. A strong dependence of the magnetomechanical damping on the strain amplitude is observed. At the same time, the main contribution to the ΔE-effect is amplitude-independent. The obtained results are compared with the models considering reversible and irreversible processes of magnetic domain structure reconstructions. The top estimate of energy of the induced magnetic anisotropy in amorphous ribbon is received to K < 300 J/m3. [Russian Text Ignored].