Systematic analyses of anomalous torque curves in granular BaFe12O19/SiO2/Si thin films

A. Lisfi, J.C. Lodder

    Research output: Contribution to journalArticleAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    An anomaly has been observed in the magnetic torque curve of BaFe12O19 films grown on a SiO2/Si substrate. The kink in the torque curve has a strong dependence on the film thickness and appears when the field direction is close to the film plane. Structural analyses together with the support of magnetic loop measurements reveal a polycrystalline structure, with magnetic properties strongly dependent on film thickness. At low thicknesses, a granular structure with a perpendicular c-axis is dominant, whereas, at large thicknesses, a new texture with a tilted c-axis (61° from the film plane! is well developed. By considering the contribution of both types of grains, the shape of torque curve is well predicted and the kink origin is attributed to the tilt of the c-axis.
    Original languageEnglish
    Pages (from-to)719-721
    Number of pages3
    JournalApplied physics letters
    Volume83
    Issue number4
    DOIs
    Publication statusPublished - 2003

    Keywords

    • SMI-TST: From 2006 in EWI-TST
    • SMI-MAT: MATERIALS

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