Investigations of microstructure of thin TbFeCo films by high-resolution electron microscopy

Z. G. Li, David Smith, E. E. Marinero, J. A. Willett

    Research output: Contribution to journalArticlepeer-review

    7 Scopus citations

    Abstract

    High-resolution electron microscope observations confirm the presence of small crystallites in thin TbFeCo films protected by Si3N4 overcoats. Selected area electron diffraction patterns in top-view projection indicate that the crystals have a face-centered-cubic structure. Microscope analysis reveals grain growth following annealing of these protected thin films at 200°C in vacuum, and Kerr measurements yield large reductions in coercivity relative to the room-temperature value. The typical grain size visible in top-view observations increases from about 3 nm in the as-deposited samples to about 30 nm after annealing at 200°C for 36 h while the static coercivity, Hc, drops by about 40%. The fcc structure of the crystals is retained after annealing.

    Original languageEnglish (US)
    Pages (from-to)6590-6594
    Number of pages5
    JournalJournal of Applied Physics
    Volume69
    Issue number9
    DOIs
    StatePublished - 1991

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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