Application of nanocrystalline fe(or co-fe)-hf-o magnetic films with high electrical resistivity to micro dc-dc converters

Toshiro Sato; Eiichi Komai; Kiyohito Yamasawa; Takashi Hatanai; Akihiro Makino

doi:10.1109/20.617927

Application of nanocrystalline fe(or co-fe)-hf-o magnetic films with high electrical resistivity to micro dc-dc converters

Toshiro Sato, Eiichi Komai, Kiyohito Yamasawa, Takashi Hatanai, Akihiro Makino

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

High resistivity magnetic films, such as reactive sputtered Fe-Hf-O and Co-Fe-Hf-O, were applied to multilayered micro reactors for high frequency operation dc-dc converters. For a comparison, an amorphous Co-Ta-Hf film with good soft magnetic properties was also investigated. The micro reactor had the highest quality factor(the lowest loss) when using Co-Fe-Hf-O film with the highest resistivity. In 5MHz operation of dc-dc converters using these micro reactors, the highest conversion efficiency was obtained when using Co-Fe-Hf-O film.

Original language	English
Pages (from-to)	3310-3312
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	33
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/20.617927
Publication status	Published - 1997
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.617927

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abstract = "High resistivity magnetic films, such as reactive sputtered Fe-Hf-O and Co-Fe-Hf-O, were applied to multilayered micro reactors for high frequency operation dc-dc converters. For a comparison, an amorphous Co-Ta-Hf film with good soft magnetic properties was also investigated. The micro reactor had the highest quality factor(the lowest loss) when using Co-Fe-Hf-O film with the highest resistivity. In 5MHz operation of dc-dc converters using these micro reactors, the highest conversion efficiency was obtained when using Co-Fe-Hf-O film.",

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AU - Sato, Toshiro

AU - Komai, Eiichi

AU - Yamasawa, Kiyohito

AU - Hatanai, Takashi

AU - Makino, Akihiro

PY - 1997

Y1 - 1997

N2 - High resistivity magnetic films, such as reactive sputtered Fe-Hf-O and Co-Fe-Hf-O, were applied to multilayered micro reactors for high frequency operation dc-dc converters. For a comparison, an amorphous Co-Ta-Hf film with good soft magnetic properties was also investigated. The micro reactor had the highest quality factor(the lowest loss) when using Co-Fe-Hf-O film with the highest resistivity. In 5MHz operation of dc-dc converters using these micro reactors, the highest conversion efficiency was obtained when using Co-Fe-Hf-O film.

AB - High resistivity magnetic films, such as reactive sputtered Fe-Hf-O and Co-Fe-Hf-O, were applied to multilayered micro reactors for high frequency operation dc-dc converters. For a comparison, an amorphous Co-Ta-Hf film with good soft magnetic properties was also investigated. The micro reactor had the highest quality factor(the lowest loss) when using Co-Fe-Hf-O film with the highest resistivity. In 5MHz operation of dc-dc converters using these micro reactors, the highest conversion efficiency was obtained when using Co-Fe-Hf-O film.

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Application of nanocrystalline fe(or co-fe)-hf-o magnetic films with high electrical resistivity to micro dc-dc converters

Abstract

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