The magnetic and magnetostrictive properties of the Tb/sub x/Dy/sub 1-x/ highly magnetostrictive alloys were measured in the region of large magnetostriction to anisotropy ratios (x=0.5, 0.6, and 0.67). Magnetizations and magnetostrictions under compressive stresses up to 25 MPa and fields up to 2 kOe were compared to theoretical curves. Field dependences clearly display magnetization discontinuities and magnetic rotation regions. From these data and from corresponding elastic modulus measurements, permeabilities, piezomagnetic d-constants (d/sub 33/), and elastic compliances were calculated. For some values of stress and magnetic field, Delta E effects >10 and coupling factors (k/sub 33/) approach unity.>
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Clark et al. (1992) studied this question.
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