Magnetically modulated optical transmission of magnetic fluid films

H. E. Horng*, S. Y. Yang, W. S. Tse, H. C. Yang, Weili Luo, Chin Yih Hong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


The optical transmission of the magnetic fluid film under perpendicular magnetic fields was investigated by measuring the transmitted intensity of the normally incident light through the film. The transmittance I/I0 of the magnetic fluid film was observed to decrease with the increase of the magnetic field strength H due to the reduction in the area occupied by the relatively optic transparent liquid phase. Moreover, under a given H, the transmittance decreased exponentially with the increasing film thickness L, i.e. I/I0=exp(-L/δ), where the δ denotes the attenuation distance. It was further found that the δ varies with the magnetic field strength and the concentration of the fluid, but is independent of the sweep rate of the field.

Original languageEnglish
Pages (from-to)104-106
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3 SPEC. ISS.
Publication statusPublished - 2002 Nov


  • Attenuation distance
  • Magnetic fluid
  • Transmittance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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