Magnetization process of Sm_5Fe_(17) magnets

摘要

Recent experiments indicate that Sm-Fe melt-spun ribbons with the Sm_5Fe_(17) phase exhibit high coercivity. To elucidate this phenomenon, we performed magnetization measurements and microstructural studies of Sm_5Fe_(17) melt-spun ribbon with coercivity. We found that the coercivity of Sm_5Fe_(17) melt-spun ribbon is single-domain type, and that Sm_5Fe_(17) melt-spun ribbon with high coercivity possesses fine grains of 10-20 nm in diameter.