Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

Masaaki Motozawa, Tatsuo Sawada

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.

Original languageEnglish
Pages (from-to)66-69
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 2005 Mar


  • Anisotropy
  • Cluster
  • Magnetic fluid
  • Sound velocity
  • Ultrasonic wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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