Exotic thin films made from cobalt ferrite

A. Lisfi, C.M. Williams, A. Johnson, P. Chang, H. Corcoran, L.T. Nguyen, J.C. Lodder, W. Morgan

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    Epitaxial CoFe2O4 thin films have been grown by PLD on (100) MgO substrate. Two types of spin-reorientation have been observed in such films upon annealing or increasing the film-thickness. In the as-deposited layers and at low thickness the easy axis is confined to the normal to the film plane whereas at large thickness the film plane becomes the preferential direction of the magnetization. On the other hand annealing induces a reorientations is explained in term of competition between stress and magnetocrystalline anisotropies. In the as-deposited state the tensile stress induces a huge perpendicular anisotropy, dominating the in-plane magnetocrystalline component. However annealing or increasing the film thickness releases the stress and allows the in-plane magnetocrystalline anisotropy to take the lead.
    Original languageEnglish
    Title of host publication9th International Conference on Ferrites (ICF9)
    Subtitle of host publicationProceedings San Francisco, California, 2004
    EditorsR.F. Soohoo
    PublisherAmerican Ceramic Society
    Pages227-234
    Number of pages8
    ISBN (Print)978-1-57498-218-3
    Publication statusPublished - 2005
    Event9th International Conference on Ferrites, ICF 2004 - San Francisco, United States
    Duration: 22 Aug 200427 Aug 2004
    Conference number: 9

    Conference

    Conference9th International Conference on Ferrites, ICF 2004
    Abbreviated titleICF9
    CountryUnited States
    CitySan Francisco
    Period22/08/0427/08/04

    Keywords

    • SMI-EXP: EXPERIMENTAL TECHNIQUES
    • SMI-MAT: MATERIALS

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