等方性Co-MgF<sub>2</sub>グラニュラー膜の磁気光学特性と光プローブ電流センサへの適用

DOI

書誌事項

タイトル別名
  • Magneto-Optical Properties of Isotropic Co-MgF<sub>2</sub> Granular Film and Their Application to Optical-Probe Current Sensor

抄録

<p>  In recent years, the spread of power semiconductor devices such as SiC/GaN that can enable high speed switching has contributed to the miniaturization and increasing efficiency of the power electronics systems. The optical-probe current sensor proposed by our group has an ultra-compact probe, so in-situ measurement of switching current is possible. In this paper, to improve the sensitivity of the Co-MgF2 granular film with an in film-plane magnetization used as a Faraday element of this sensor, we fabricated the isotropic granular film in all directions by reducing the demagnetizing effect in perpendicular to the film-plane. This is achieved by reducing the magnetic dipole interaction between cobalt nano particles in the granular film. In this case, this film is easily magnetized in perpendicular to the film-plane, and it has high transmittance for infrared light. We confirmed that the figure of merit(°/kA・m-1・dB) defined as the Faraday-rotation angle per unit transmission loss was increased. In fact, the signal-to-noise ratio of the optical-probe current sensor with isotropic granular film was significantly improved.</p>

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詳細情報 詳細情報について

  • CRID
    1390014481303086080
  • DOI
    10.20819/msjtmsj.23tr502
  • ISSN
    24320471
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
  • 抄録ライセンスフラグ
    使用不可

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