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 journalArticle

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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

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Keywords

  • Hexagonal structure
  • Labyrinthine structure
  • Microdrops

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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