Retarded response of the optical transmittance through a magnetic fluid film under switching-on/off external magnetic fields

S. Y. Yang, Y. T. Hsiao, Y. W. Huang, H. E. Horng, Chin Yih Hong, H. C. Yang

Research output: Contribution to journalArticle

14 Citations (Scopus)


In our research, we develop the setup to observe the time-dependent response of the optical transmission through a magnetic fluid film under switching-on or -off the external magnetic field. The optical transmittance is reduced when an external magnetic field is applied perpendicularly to a magnetic fluid film. It was further found that the transmittance starts to decrease in tens of milliseconds after switching-on the external field (referred as the charging process). This retarded response of the transmittance with respect to the external of the field also occurs when the field is switched off (referred as the discharging process), with the retarding time ranging from several to tens of milliseconds, depending on field strength. In addition, the exponential decay or increase in the transmitted intensity was observed for the charging or discharging process, respectively.

Original languageEnglish
Pages (from-to)48-52
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number1
Publication statusPublished - 2004 Oct 1



  • Magnetic fluid
  • Retarding
  • Transmittance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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