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http://dx.doi.org/10.4283/JKMS.2002.12.4.154

The Magnetic Properties of FeBSiNb Alloy Ribbons with High Glass forming Ability  

Noh, Tae-Hwan (안동대학교 공과대학 신소재공학부)
Kim, Gu-Hyun (안동대학교 공과대학 신소재공학부)
Abstract
Amorphous FeBSiNb alloy ribbons having bulk glass forming ability and high saturation magnetic flux density were produced by single-roller melt spinning apparatus in the thickness range of 22∼102㎛. With the increase of thickness, the coercive force and squareness ratio decreased, while maximum permeability and AC permeability increased. However electrical resistivity was almost constant. Furthermore refined and complex magnetic domain structure was observed in thicker ribbons owing to the change in internal magnetic anisotropy. For the alloy with the thickness of 81㎛, small coercive force of 24 mOe and high effective permeability of 12,000 at 1㎑ were obtained, those are considered to be better comparing to the conventional soft magnetic amorphous alloys (∼20 ㎛). The good soft magnetic properties of the thick FeBSiNb amorphous alloys were attributed to the decrease in surface pinning effect during wall motion, appearance of perpendicular anisotropy and resulted domain refinement.
Keywords
bulk amorphous alloy; high glass forming ability; FeBSiNb ribbons; soft magnetic properties; domain structure;
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