TENSILE STRESS DEPENDENCE OF COERCIVE FIELD AND MAGNETIZATION OF Fe-BASED AMORPHOUS ALLOYS

The variations of coercive force and the saturation magnetization with the applied stress in Fe_73.5Si_13.5B₉Cu₁X₃ (X= Nb, Ta and Mo) and Fe₈₇Zr₇B₆ amorphous alloys are investigated. The variations of magnetization and coercive force in the FeZrB alloy could be linked to the changes of Fe-Fe distance with the applied stress while in the Si-containing ones the stress dependence of the coercivity can be interpreted by considering two different mechanisms: the pinning of the domain walls on the stress centers and the domain wall energy dependence on the surface roughness.