抄録
In the present study, high sensitive detection of the reversible susceptibility modulation in the magnetic thin film was performed by an LC circuit resonant technique. A flat pick-up coil with the inductance of 0.80 μH and a capacitance of 100 pF construct the LC resonant circuit. The reversible susceptibility χ of the magnetic thin film, embedded in the pick-up coil, was measured with a sinusoidal exciting field (H). The out put signal was modulated by applying an orthogonal bias field (Hb). A multilayer sample of [NiFe(100 nm)/Cu(10 nm)20 exhibits the most sensitive modulation effect among the fabricated samples. That is, the resonant frequency fr was decreased from 11.58 MHz (Hb = 0 Oe) to 8.22 MHz (Hb = 7 Oe) at Hex = 2.5 mOe, suggesting the marked increase of χ. The value of Hb, which minimizes f r, is comparable to the anisotropy field. Thus, the observed drastic increase of χ can be associated with the compensation of the anisotropy with Hb, as confirmed from the theoretical prediction. The practical out put voltage change of 55%/Oe was realized for the fabricated resonator.
本文言語 | English |
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ページ(範囲) | 89-93 |
ページ数 | 5 |
ジャーナル | Research Reports on Information Science and Electrical Engineering of Kyushu University |
巻 | 13 |
号 | 2 |
出版ステータス | Published - 2008 9月 |
外部発表 | はい |
ASJC Scopus subject areas
- コンピュータ サイエンス(全般)
- 電子工学および電気工学