Micromagnetic Barkhausen emission analysis of Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/ under the action of an alternating field excitation

摘要

The ternary alloy Tb/sub 0.3/Dy/sub 6.7/Fe/sub 2/ has aroused great interest because of its minimum anisotropy among the alloys of dysprosium, terbium, and iron at room temperature, which allows high magnetostrictions to be obtained at low field strengths. In the present investigation, the Barkhausen effect emissions of this material have been analyzed with different techniques, including the waveforms, RMS voltages, and pulse height spectra of the Barkhausen signals.