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Aggregation kinetics and stability of structures formed by magnetic microspheres

  • Weijia Wen
  • , F. Kun
  • , K. F. Pál
  • , D. W. Zheng
  • , K. N. Tu

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

Stable rings formed by magnetization-controllable microspheres at zero field are observed and reported in this Rapid Communication. The magnetic microspheres were made by plating glass beads with a critical thickness of Ni film. We found that the ring leading to magnetic flux closure is the most stable configuration. At high concentrations, all individual rings, chains, and clusters join together to form a netlike structure. A computer simulation based on the dipole-dipole interaction, without thermal noise, has been carried out, and the results are in good agreement with the experimental observations. Based on an analytic approach we give a simple explanation of the formation and stability of rings. © 1999 The American Physical Society.
Original languageEnglish
Pages (from-to)R4758-R4761
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume59
Issue number5
DOIs
Publication statusPublished - 1999
Externally publishedYes

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