Abstract
Amorphous Fe 100- x B x (11.5 ≦ x ≦ 22) alloys having the invar characteristics were prepared by a single roller quenching method to investigate the magneto-volume effect. Forced volume magnetostriction, ∂ω/∂ H, increased remarkably with decreasing boron content and the maximum value obtained was about 90 × 10 −10 Oe −1 at 11.5 at.% boron. The estimated value of the pressure dependence of the Curie temperature, ∂ T c /∂ P, was considerably large, being comparable to those of crystalline FeNi invar alloys. The ∂ T c /∂ P curve plotted as a function of T c approximately fitted Wohlfarth's expression.
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