Archives of Acoustics, 31, 4(S), pp. 153-158, 2006

Acoustic and magnetic properities dependence of restructuring differents magnetic fluids subjected to external magnetic fluid

P. Regulska
Adam Mickiewicz University, Faculty of Physics, Institute of Acoustics, Umultowska 85, 60-614 Poznań
Poland

A. Skumiel
Adam Mickiewicz University, Faculty of Physics, Institute of Acoustics, Umultowska 85, 60-614 Poznań
Poland

A. Józefczak
Adam Mickiewicz University, Faculty of Physics, Institute of Acoustics, Umultowska 85, 60-614 Poznań
Poland

The influence of magnetic field intensity and temperature on acustic and magnetic proprieties
was considered. Measurements were conducted at an ultrasonic wave frequency of
3.6 MHz, by a pulse method using the MATEC apparatus. The direction of ultrasonic wave
propagation was parallel to the direction of the external magnetic field. The magnetic field
range was 10–150 kA/m. The studies were performed for a selected temperatures. The results
of this experiments suggested that in magnetic fluids there are different effects connect with
restructuring this fluids.
Keywords: magnetic fluid, ultrasonic absorption, magnetization.
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