| 講演抄録／キーワード |
| 講演名 |
2012-11-29 14:00
Analysis of Center Frequency of Noise Suppression for Ferromagnetic Thin-Film Noise Suppressor
○Sho Muroga・Yuki Asazuma・Masahiro Yamaguchi（Tohoku Univ.） |
| 抄録 |
（和） |
This paper discussed that the FMR shift can be calculated by an electromagnetic field simulator based on the Maxwell’s equation although the FMR frequency itself is defined by Landau-Liftshitz-Gilbert (LLG) equation. In order to show the validity of this idea, we evaluated the magnetic circuit model considering the leakage magnetic flux path for applying the demagnetizing field generated in the magnetic film. As a result, the calculated relative permeability and the FMR frequency agree with the measurement result. This result shows that the effect of the demagnetizing field in the magnetic circuit calculation is considered as a reluctance of the leakage magnetic flux path, which is consider as the increase of anisotropy field in the case of the LLG equation. |
| （英） |
This paper discussed that the FMR shift can be calculated by an electromagnetic field simulator based on the Maxwell’s equation although the FMR frequency itself is defined by Landau-Liftshitz-Gilbert (LLG) equation. In order to show the validity of this idea, we evaluated the magnetic circuit model considering the leakage magnetic flux path for applying the demagnetizing field generated in the magnetic film. As a result, the calculated relative permeability and the FMR frequency agree with the measurement result. This result shows that the effect of the demagnetizing field in the magnetic circuit calculation is considered as a reluctance of the leakage magnetic flux path, which is consider as the increase of anisotropy field in the case of the LLG equation. |
| キーワード |
（和） |
Electoromagnetic noise suppressor / Ferromagnetic film / Magnetic circuit / Electromagnetic simulator / Ferromagnetic resonance frequency / Ferromagnetic rresonance loss / Loss peak frequency / |
| （英） |
Electoromagnetic noise suppressor / Ferromagnetic film / Magnetic circuit / Electromagnetic simulator / Ferromagnetic resonance frequency / Ferromagnetic rresonance loss / Loss peak frequency / |
| 文献情報 |
信学技報 |
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