Acoustic Spectroscopy of Magnetic Fluid Based on Transformer Oil
نویسندگان
چکیده
The structural changes in a magnetic fluid (formation of clusters) upon the effect of an external magnetic field were studied by acoustic spectroscopy. The properties of magnetic fluid dispersed in inhibited transformer oil ITO 100 have been studied by the analysis of changes in the acoustic wave absorption coefficient. The absorption coefficient of acoustic waves was measured as a function of an external magnetic field in the range of 0–400 mT, parallel to the direction of acoustic wave propagation. The magnetic fluids change their structure under the influence of an external magnetic field and do not return immediately to the initial state after the magnetic field switching off. It is supposed that the cluster of magnetic nanoparticles formed in the fluid subjected to a magnetic field remains after the field has been removed for the some time.
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