Magnetic properties of cobalt ferrite (001) films grown on spinel-type buffer layers

Y. Hisamatsu, T. Niizeki, H. Yanagihara, E. Kita

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    CoxFe3-xO4 (CFO) is a well-known spinel-type ferrite magnetic material showing large cubic magnetic anisotropy and magnetostriction[1]. Epitaxial films of CFO(001) grown on MgO(001) substrates exhibit extremely large perpendicular magnetic anisotropy (PMA) exceeding 10 Merg/cm3 owing to tensile stress originating from the lattice mismatch between the films and substrates[2]. Since the lattice constant of MgO is slightly larger than half that of the cobalt-ferrite, MgO(001) is a suitable substrate for growing CFO(001) with strong PMA. It is known that antiphase boundaries (APBs) exist at the interfaces in most of the spinel ferrite films grown on MgO(001). The high-density APBs contribute to the degradation of the magnetic properties of ferrite films such as the Fe3O4/ MgO(001).[3] Therefore, it is crucial to develop a technique to reduce the number of APBs to utilize practically CFO films with large PMA. For this purpose, we attempted the insertion of spinel-type buffer layers and investigated how the insertion layers affect the magnetic properties of CFO films.

    本文言語English
    ホスト出版物のタイトル2015 IEEE International Magnetics Conference, INTERMAG 2015
    出版社Institute of Electrical and Electronics Engineers Inc.
    ISBN(電子版)9781479973224
    DOI
    出版ステータスPublished - 2015 7 14
    イベント2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
    継続期間: 2015 5 112015 5 15

    出版物シリーズ

    名前2015 IEEE International Magnetics Conference, INTERMAG 2015

    Other

    Other2015 IEEE International Magnetics Conference, INTERMAG 2015
    国/地域China
    CityBeijing
    Period15/5/1115/5/15

    ASJC Scopus subject areas

    • 表面、皮膜および薄膜
    • 電子材料、光学材料、および磁性材料
    • 電子工学および電気工学

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