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

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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781479973224
    DOIs
    Publication statusPublished - 2015 Jul 14
    Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
    Duration: 2015 May 112015 May 15

    Publication series

    Name2015 IEEE International Magnetics Conference, INTERMAG 2015

    Other

    Other2015 IEEE International Magnetics Conference, INTERMAG 2015
    CountryChina
    CityBeijing
    Period15/5/1115/5/15

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films
    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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