Microwave and ultra sound methods of the size determination of ferromagnetic particles and agglomerates in magnetic fluid

D. A. Usanov - A. V. Skripal - S. A. Ermolaev

Department of Physics, Saratov State University, Saratov, 410071

Abstract
Investigation results of the magnetic fluid structure have been presented. The dependence of ferromagnetic resonance curve width in the microwave band on the size of magnetic fluid particles has been established. The possibility of visually observation of the agglomeration process with a ultra sound scanning methods has been shown. It has been compared the agglomeration process of magnetic fluid in the volume with ultra sound method and in the thin layer with a optical diffraction method. The effect of agglomerates destruction of ferromagnetic particles by action mechanical vibration on the magnetic fluid has been found experimentally. Figs 8, refs 10.