New applications of nanocrystalline Fe(Co-Fe)-Hf-O magnetic films to micromagnetic devices

T. Sato, Y. Miura, S. Matsumura, K. Yamasawa, S. Morita, Y. Sasaki, T. Hatanai, A. Makino

研究成果: Article査読

27 被引用数 (Scopus)

抄録

New applications of high resistivity magnetic films, such as Fe-Hf-O and Co-Fe-Hf-O as thin film inductors and flux gate magnetic sensors, were investigated. These soft magnetic films with nanocrystalline structure and high resistivity were deposited on glass substrate by using the oxygen reactive sputtering method. Planar sandwich thin film inductors developed by using Fe-Hf-O or Co-Fe-Hf-O films had a higher quality factor than that of an amorphous Co-Ta-Hf film inductor. The dc-dc converter using the Fe(Co-Fe)-Hf-O film inductor had higher conversion efficiency. These high resistivity magnetic films were also applied to a flux gate magnetic sensor operated at high frequencies over 1 MHz. Both high frequency excitation and high permeability (owing to the low eddy current loss) enabled us to increase the sensitivity, e.g., 39 mV/Oe/turn at 5 MHz when using a 3 μm thick Fe-Hf-O film (12x6 mm2 area).

本文言語English
ページ(範囲)6658-6660
ページ数3
ジャーナルJournal of Applied Physics
83
11
DOI
出版ステータスPublished - 1998
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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