Field-dependent phase diagram of the structural pattern in a ferrofluid film under perpendicular magnetic field

Chin Yih Hong, Chih Hao Lin, Chun Hui Chen, Y. P. Chiu, S. Y. Yang, H. E. Horng, H. C. Yang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Influences of both the magnetic field strength H and the sweep rate dH/dt on the structural pattern evolution in a magnetic fluid film under perpendicular fields are systematically investigated. When the magnetic field is increased at a given rate, the structure evolves from a monodispersed state to a disordered one, then to the first-level ordered hexagonal structure, and finally to the second-level ordered structure through a transition state. With a higher dH/dt, the range of the applied magnetic field corresponding to the first-level ordered structure is widened and the field Hs, at which the transition occurs becomes higher. An empirical power law Hs ∞ (dH/dt) 0.4 was found. A phase diagram for the magnetic fluid film in the H-dH/dt plane is presented.

Original languageEnglish
Pages (from-to)1881-1883
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume226-230
Issue numberPART II
DOIs
Publication statusPublished - 2001 Jan 1

Keywords

  • Hexagonal
  • Labyrinth pattern
  • Magnetic fluid
  • Phase diagram
  • Structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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