Determination of Sound Speed in a Magnetic Fluid Using Acoustomagnetic Effect
نویسنده
چکیده
This paper describes the interferometric methodology for determining the speed of ultrasonic wave’s propagation in a magnetic fluid. The technique uses acoustomagnetic effect, which can be observed in a magnetized magnetic fluid, when elastic oscillations inside it. We describe the experimental setup and the measurement technique in detail. We determined the speed of ultrasonic waves propagation in the system Magnetic Fluid Cylindrical Shell for two samples of nanodispersed magnetic fluids. The samples are colloidal solutions of single-domain magnetite particles in a hydrocarbon (kerosene, mineral oil) medium stabilized by oleic acid. We got the values of the sound speed in the system Magnetic Fluid Glass Tube for different frequencies of sound introduced into the system. Estimation of the sound speed in the not-limited samples, held by the Korteweg formula, correlates with the previously obtained values. One can use our experimental data to calculate physical (magnetic and geometric) parameters of magnetic nanoparticles, which are dispersed in a magnetic fluid, by acoustogranulometric analysis.
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