Abstract
Linear saturation magnetostrictions (295 K) of Fe 80t- x Co x B 20, 0⩽ x⩽80, and Fe 80− x Ni x B 20, 0⩽ x⩽60 (at. %) glasses are reported. The saturation magnetostrictions of the Fe-Ni-base glasses vary as the sqaure of their respective saturation magnetizations. The behavior in the Fe-Co-base glasses is strikingly different. The compositional trends suggest a difference in origin of magnetostrictions between Fe-Ni-base and Co-containing glasses. When magnetostrictions for these glasses are compared with those for Fe-Co and Fe-Ni polycrystalline alloys, the most significant discrepancies appear in the Fe-rich compositions. This is probably related to the difference in short range order between the crystalline and non-crystalline Fe-rich alloys: α-Fe is 8-fold coordinated whereas all of the metallic glasses studied show ∼ 12-fold metal coordination.
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