Pattern formation in microdrops of magnetic fluids

I. J. Jang, H. E. Horng, Y. C. Chiou, Chin Yih Hong, J. M. Wu, H. C. Yang

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    The pattern formation of magnetic fluid films containing magnetic microdrops under applied perpendicular magnetic fields was investigated. At a zero field, these drops of size several μm were initially near-circular. As the field strength increased, these drops changed to dumbbells or branched structure. When the field strength increased again, a labyrinthine structure appeared. At even higher field strength, the connectivity of the drops broke up; and finally an equilibrium hexagonal structure formed inside the film. A new phase transition exists between the labyrinthine structure and the hexagonal structure, which has not been seen before. Also, the reverse process of pattern formation is irreversible.

    Original languageEnglish
    Pages (from-to)317-320
    Number of pages4
    JournalJournal of Magnetism and Magnetic Materials
    Volume201
    Issue number1-3
    DOIs
    Publication statusPublished - 1999 Jul

    Keywords

    • Hexagonal structure
    • Labyrinthine structure
    • Microdrops

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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