Archives of Acoustics,
23, 2, pp. 195-210, 1998
Resonance absorption of ultrasonic waves in a magnetic fluid
An external magnetic field applied to a magnetic fluid gives rise to the appearance of spherical and chain-like clusters.
The present work is based on an acoustic method permitting the determination of the presence and size of the clusters by resonance absorption of an ultrasonic wave in a magnetic fluid under the influence of a magnetic field.
Measurements by applying the pulse method of the variations of the ultrasonic absorption coefficient Δα for three frequencies in a selected magnetic fluid versus the external magnetic field strength have been reported.
The present work is based on an acoustic method permitting the determination of the presence and size of the clusters by resonance absorption of an ultrasonic wave in a magnetic fluid under the influence of a magnetic field.
Measurements by applying the pulse method of the variations of the ultrasonic absorption coefficient Δα for three frequencies in a selected magnetic fluid versus the external magnetic field strength have been reported.
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References
R.W. CHANTRELL, A. BRADBURY, J. POPPLEWELL and S.W. CHARLES, Agglomerate formation in a magnetic fluid, J. Appl. Phys., 53, 2742-2744 (1982).
H.W. DAVIES and J.P. LLEWELLYN, Magnetic birefringence of ferrofluids, J. Phys. D: Appl. Phys., 12, 311-319 (1979).
W. FERTMAN, Magnetic liquids [in Russian], High School, Minsk 1988.