Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

Masaaki Motozawa, Tatsuo Sawada

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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
Volume289
DOIs
Publication statusPublished - 2005 Mar

Fingerprint

Ultrasonic propagation
Magnetic fluids
propagation velocity
ultrasonics
Magnetic fields
fluids
Anisotropy
Ultrasonics
magnetic fields
magnetic flux
Brownian movement
Kerosene
kerosene
anisotropy
Hysteresis
ultrasonic radiation
wave propagation
hysteresis
configurations
pulses

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids. / Motozawa, Masaaki; Sawada, Tatsuo.

In: Journal of Magnetism and Magnetic Materials, Vol. 289, 03.2005, p. 66-69.

Research output: Contribution to journalArticle

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