1. Physical and Magnetic Properties of ThMn 12 -Type Sm(Fe 0.8 Co 0.2) 10 Si 2 Melt-Spun Ribbons.
- Author
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Qian, Hui-Dong, Lim, Jung Tae, Kim, Jong-Woo, Yang, Yang, Zhou, Tian Hong, Jeon, Han Kook, Park, Jihoon, and Choi, Chul-Jin
- Subjects
MAGNETIC properties ,GRAIN size ,COERCIVE fields (Electronics) ,MAGNETIZATION - Abstract
The magnetic properties of ThMn
12 -type Fe-rich compounds were investigated by producing Sm(Fe0.8 Co0.2 )10 Si2 ribbons. The produced ribbons, with different conditions by varying the melt-spinning conditions, were characterized to investigate physical and magnetic properties. Weight fraction of ThMn12 -type phase decreased from 94.5 to 57.1 wt. % as the melt-spinning wheel speed increased from 6.5 to 39 m/s, and corresponding magnetizations and coercivities were substantially varied; the coercivity increased up to 0.175 T from 0.058 T by increasing the wheel speed from 6.5 to 26 m/s, and their magnetization also increased from 89.81 Am2 /kg to 105.58 Am2 /kg, even though the content of ThMn12 -type phase decreased. Morphologies of the ribbons were also observed to verify the melt-spinning effects on the surface conditions and grain sizes. It was found that the particle and grain sizes in the ribbons became smaller and striped patterns appeared as the wheel speed increased. The grain size decreased from about 1 μm to 250 nm by increasing the wheel speed from 6.5 to 39 m/s. [ABSTRACT FROM AUTHOR]- Published
- 2022
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