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Magnetostriction and Coercivity of Soft Magnetic Fe-(Al, Ga)-(P, C, B, Si) Bulk Glassy Alloys

Published online by Cambridge University Press:  11 February 2011

Akihiro Makino ,
Teruo Bitoh  and
Akihisa Inoue
Akihiro Makino
Affiliation:
Department of Machine Intelligence and Systems Science, Faculty Systems Science and Technology, Akita Prefectural University, Honjo 015–0055, Japan.
Teruo Bitoh
Affiliation:
Department of Machine Intelligence and Systems Science, Faculty Systems Science and Technology, Akita Prefectural University, Honjo 015–0055, Japan.
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980–8577, Japan.
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Abstract

The relationship between coercivity (H c) and magnetostriction (λs) of the glassy Fe-(Al, Ga)-(P, C, B, Si) alloys has been discussed. The glassy Fe-(Al, Ga)-(P, C, B, Si) alloys exhibit lower H c and lower I s compared with the conventional Fe-based amorphous alloys with the same λs and Fe content, respectively. Theoretical analysis on the basis of domain-wall movement suggests that the low H c results from the long-range homogeneous structure of the glassy alloys, which realizes a low density of pinning centers. The good combination of high glass-forming ability and good soft magnetic properties (especially low H c) indicates the possibility of future development as new bulk glassy soft magnetic materials.

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