Experimental results for the DC magnetic field influence on the anisotropy of attenuation of ultrasound in ferrofluids are presented. The measurements were performed for the frequency 1.18 MHz, at the temperatures 10 and , with magnetic field strengths H = 39.8, 79.58 and . Comparison of the experimental results with the Taketomi theory allowed the determination of the cluster radius and the number density of the colloidal particles.
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Skumiel et al. (1997) studied this question.
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