Kb. Hathaway et al., MAGNETOMECHANICAL DAMPING IN GIANT MAGNETOSTRICTION ALLOYS, Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 26(11), 1995, pp. 2797-2801
Magnetomechanical damping in the giant magnetostriction material Terfe
nol-D has been investigated by quasi-static stress-strain measurements
and modeled theoretically. The damping capacity is a strong function
of applied stress amplitude, increasing to a maximum at some finite st
ress and then decreasing slowly at still larger applied stresses. Maxi
mum damping capacities greater than 1.0 were observed for the lowest m
agnetic bias fields and prestresses at applied stress amplitudes of 4
MPa. Both the qualitative behavior of the damping and its magnitude ar
e successfully described by a model of abrupt magnetization jumps with
in individual domains driven by the applied stress.