Effect of Nb contents on microstructure and magnetic properties of FeCoNbB films has been studied. X-ray diffraction （XRD） analysis reveals that Nb plays a role in refining grain and in facilitating formation of amo...Effect of Nb contents on microstructure and magnetic properties of FeCoNbB films has been studied. X-ray diffraction （XRD） analysis reveals that Nb plays a role in refining grain and in facilitating formation of amorphous structure. When Nb content is more than 8 at%, the films transform from crystalline to amorphous structure, accompanied by variations in magnetic properties. An unusual out-of-plane anisotropy component is consequently observed. It can be suggested that the anisotropy induced by increasing Nb contents be attributed to stress-related magnetoelastic anisotropy. The undesirable anisotropy is greatly reduced by thermal annealing, reducing film thicknesses or applying an external magnetic field together with Si addition.展开更多
基金National Natural Science Foundation of China (50941046)
文摘Effect of Nb contents on microstructure and magnetic properties of FeCoNbB films has been studied. X-ray diffraction （XRD） analysis reveals that Nb plays a role in refining grain and in facilitating formation of amorphous structure. When Nb content is more than 8 at%, the films transform from crystalline to amorphous structure, accompanied by variations in magnetic properties. An unusual out-of-plane anisotropy component is consequently observed. It can be suggested that the anisotropy induced by increasing Nb contents be attributed to stress-related magnetoelastic anisotropy. The undesirable anisotropy is greatly reduced by thermal annealing, reducing film thicknesses or applying an external magnetic field together with Si addition.
