Magnetoelatic Behaviors of Polycrystalline Gadolinium

概要

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Magnetomechanical damping in polysrystalline gadolinium was measured as a function of temperature, applied magnetic field and frequency of kilohertz range, and also the temperature dependence of ΔE effect was observed. Micro eddy current loss δ_i in demagnetized state was much smaller than that in metals of cubic structure, and was comparable with that in cobalt. At a constant temperature, after passing through a peak, δ_i increased again linearly with field in approximate saturating field. These trends are explained qualitatively from the variation of relaxation frequency with field. Further the peak of macro eddy current loss was observed in the temperature range from 200 to 250°K, where the occurrance of the corresponding change in gradient of magnetostriction versus field curve is shown. In addition, the measured value decrement was strongly influenced by the internal friction due to anelasticity.
社団法人日本物理学会の論文
1971-07-05