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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 22, No. 38 >


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Title: Co系非晶質磁性薄帯における高周波透磁率の改善
Other Titles: Improvement of High Frequency Permeability in Co-Based Amorphous Magnetic Ribbons
Authors: 小笠原, 宏 / 福永, 博俊 / 古賀, 浩二 / 太田, 幸彦 / 掛橋, 英典
Authors (alternative): Ogasawara, Hiroshi / Fukunaga, Hirotoshi / Koga, Koji / Ota, Yukihiko / Kakehashi, Hidenori
Issue Date: Jan-1992
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 22(38), pp.25-32; 1992
Abstract: Improvement of high frequency magnetic properties was tried with success for Co-based amorphous ribbons. Process of the improvement is as follows. First, control of domain structure was examined and it was found that field annealing under magnetic field applied in the transverse direction of ribbon creates a ladder-like domain structure. This domain structure improves permeability and magnetic loss in the frequency range larger than 1 MHz. Insulation between ribbons results in further improvement in permeability and magnetic loss. Although reduction of ribbon thickness does not cause remarkable improvement in high frequency magnetic properties when ribbons are not insulated each other, it increases permeability and decreases magnetic loss remarkably when ribbons are insulated. The maximum permeability of 1000 at 10 MHz was obtained for 6. 8μm thick domaincontrolled ribbons with insulation. This value is about tow times as large as that conventional Mn-Zn ferrites.
URI: http://hdl.handle.net/10069/24362
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 22, No. 38

Citable URI : http://hdl.handle.net/10069/24362

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