Abstract
It has previously been reported that annealing of amorphous Sm5Fe17 melt-spun ribbon resulted in the formation of the Sm5Fe17 phase and the resultant Sm5Fe17 melt-spun ribbon exhibited a high coercivity. However, the annealing condition of the amorphous Sm5Fe17 melt-spun ribbon was somewhat critical and it was not easy to obtain Sm5Fe17 grains with high coercivity. In the present study, it was found that the small substitution of Ti for Fe in the Sm5Fe17 melt-spun ribbon stabilized the Sm5Fe17 phase. Annealed Sm5Fe16.7Ti0.3 melt-spun ribbon consisted of small and homogeneous Sm5(Fe,Ti)17 grains and exhibited a higher coercivity than the annealed Sm5Fe17 melt-spun ribbon.
Highlights
Intensive research on rare-earth-containing alloys has revealed that the Sm5Fe17 phase is a new ferromagnetic phase in the binary Sm-Fe system.[1,2] It is a metastable phase whose formation was previously reported only in sputtered films.[3,4] Recent studies have revealed that the Sm5Fe17 phase can be obtained by the annealing of amorphous Sm-Fe melt-spun ribbon.[5]
The structures of the specimens were examined by X-ray diffraction (XRD) and a transmission electron microscope (TEM)
The specimens containing Ti exhibit virtually the same XRD pattern as the Sm5Fe17 specimen, indicating that the small substitution of Ti for Fe in the Sm5Fe17 melt-spun ribbon did not affect the formation of the Sm5Fe17 phase during annealing and that the resultant annealed Sm5Fe17-xTix (x=0.1–0.5) specimens consisted of the Sm5(Fe,Ti)[17] phase
Summary
Intensive research on rare-earth-containing alloys has revealed that the Sm5Fe17 phase is a new ferromagnetic phase in the binary Sm-Fe system.[1,2] It is a metastable phase whose formation was previously reported only in sputtered films.[3,4] Recent studies have revealed that the Sm5Fe17 phase can be obtained by the annealing of amorphous Sm-Fe melt-spun ribbon.[5]. The structures and magnetic properties of the Sm5(Fe,Ti)[17] melt-spun ribbons were investigated
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