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.
| 元の言語 | English |
|---|---|
| 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 |
| 発行部数 | 2 |
| 出版物ステータス | Published - 2008 9 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science(all)
これを引用
High sensitive detection of susceptibility modulation by LC resonator embedded with ferromagnetic multilayer. / Zhang, Ming; Nozaki, Yukio; Matsuyama, Kimihide.
：: Research Reports on Information Science and Electrical Engineering of Kyushu University, 巻 13, 番号 2, 09.2008, p. 89-93.研究成果: Article
}
TY - JOUR
T1 - High sensitive detection of susceptibility modulation by LC resonator embedded with ferromagnetic multilayer
AU - Zhang, Ming
AU - Nozaki, Yukio
AU - Matsuyama, Kimihide
PY - 2008/9
Y1 - 2008/9
N2 - 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.
AB - 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.
KW - Induced magnetic anisotropy
KW - LC resonance
KW - Magnetic sensor
KW - Magnetic thin film
KW - Magneto-inductance
KW - Susceptibility
UR - http://www.scopus.com/inward/record.url?scp=57649100406&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57649100406&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:57649100406
VL - 13
SP - 89
EP - 93
JO - Research Reports on Information Science and Electrical Engineering of Kyushu University
JF - Research Reports on Information Science and Electrical Engineering of Kyushu University
SN - 1342-3819
IS - 2
ER -