Magnetochromatics resulted from optical gratings of magnetic fluid films subjected to perpendicular magnetic fields

Herng Er Horng, Chin Yih Hong, S. L. Lee, C. H. Ho, S. Y. Yang, H. C. Yang

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

A two-dimensional ordered structure can be formed in a thin film of homogeneous magnetic fluids by applying a magnetic field perpendicular to the plane of the film. The characteristic spacing of the ordered structure can be controlled by several parameters, such as the field strength, the sweep rate, the thickness of the film, and the volume concentration of homogeneous magnetic fluids. The length of the characteristic spacing ranges from several micrometers to submicrometers. Depending on the size of the spacing, magnetic fluid films are capable of diffracting an incoming white light. The diffracted light then interferes resulting in a chromatic effect. This effect is well illustrated by the chromatic rings produced by passing a white light through the magnetic fluid films possessing an ordered structure. Because of the changeability of the characteristic spacing, the magnetochromatic effect of magnetic fluid films can be controlled by altering these control parameters.

Original languageEnglish
Pages (from-to)5904-5908
Number of pages5
JournalJournal of Applied Physics
Volume88
Issue number10
DOIs
Publication statusPublished - 2000 Nov 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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