Measurements of magnetostriction of paramagnetic Fe–Mo–Cu–B metallic glasses

Abstract Magnetostriction of amorphous Fe79Mo8Cu1B12, (Fe12Co1)79Mo8Cu1B12 and (Fe9Co1)79Mo8Cu1B12 prepared by planar flow casting was measured using a direct method. The results indicate that magnetostriction in parallel ( λ ∥ ) and perpendicular ( λ ⊥ ) directions of applied magnetic field is linearly dependent on magnetic field. In order to determine the influences of chemical composition and the conditions of sample preparation the magnetostriction of pure BCC-Fe, Cu and Mo were also measured. Samples containing Co with Curie temperatures slightly above room temperatures were shown to exhibit a hybrid magnetostriction behaviour with both ferromagnetic and paramagnetic features.