Structure of the magnetic fluid film under alternating magnetic fields

H. C. Yang*, B. Y. Jeang, S. Y. Yang, H. E. Horng, T. P. Huang, Chin Yih Hong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Structural formation in the magnetic fluid film under alternating magnetic fields, Hac, perpendicular to the plane of the film, is investigated. For a given alternating frequency of the field, the structure in the magnetic fluid film evolves from a monodispersed state to a disordered column pattern, and then to an ordered structure when the amplitude of Hac increases from zero. Under the application of Hac, the diameter of a magnetic column varies periodically with the same period as that of the Hac, whereas the distance d between two neighboring columns remains fixed. This implies that the magnetic particles of columns disperse into the liquid and then agglomerate to form the original column at the same location. This process repeatedly proceeds under the application of Hac. The experimental results also show that the oscillating range of the column diameter reduces when the alternating frequency of Hac rises, and the averaged diameter of each column becomes larger.

Original languageEnglish
Pages (from-to)287-289
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3 SPEC. ISS.
Publication statusPublished - 2002 Nov


  • Alternated field
  • Column size
  • Magnetic fluid
  • Structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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