Tunneling Spin Polarization and Magnetic Properties of Co–Fe–B Alloys and Their Dependence on Boron Content

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Tunneling spin polarization (TSP) of (Co50Fe50)100-xBx alloys with various boron contents is measured by superconducting tunneling spectroscopy (STS). Because magnetic tunnel junctions (MTJs) using Co–Fe–B alloys exhibit a large tunnel magnetoresistance (TMR) effect, they are highly valued materials; in addition, the TSP of Co–Fe–B alloys is expected to be high. The maximum observed TSP value is 49% for (Co50Fe50)80B20, which is higher than that of pure Co50Fe50 (37%). An X-ray diffraction pattern showed that the structure of (Co50Fe50)80B20 is amorphous. We infer that the structure is changed to the amorphous state by increasing the boron content, which enhances the TSP of Co–Fe–B alloys.

収録刊行物

  • Japanese journal of applied physics. Pt. 2, Letters  

    Japanese journal of applied physics. Pt. 2, Letters 46(11), L250-L252, 2007-03-25 

    Japan Society of Applied Physics

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各種コード

  • NII論文ID(NAID)
    10018903282
  • NII書誌ID(NCID)
    AA10650595
  • 本文言語コード
    EN
  • 資料種別
    SHO
  • ISSN
    0021-4922
  • NDL 記事登録ID
    8695577
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z54-J337
  • データ提供元
    CJP書誌  NDL  JSAP 
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