Abstract
The absorption of ultrasound of ∼3 Mc/sec frequency was investigated in low carbon steel as a function of elastic strain applied in the presence of constant magnetic fields. The observed attenuation changes are interpreted in terms of magnetomechanical damping. The major part of the change appears to be accounted for by variation in the amplitude of the domain wall vibration, while the domain configuration changes appear to have relatively small effect. The maximum observed in the attenuation-strain curve for plastically deformed material is attributed to the presence of internal stresses.
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