Electronic edition ISSN 1574-0579

Dielectric properties of magnetic fluids based on transformer oil ITO 100 in a high frequency electric field

M. Rajnak¹ , M. Timko¹ , L. Tomco² , K. Marton³ , J. Kurimsky³ , B. Dolnik³ , R. Cimbala³ , M. Molcan¹ , P. Kopċanský¹

¹ Institute of Experimental Physics SAS, Watsonova 47, 040 01Košice, Slovakia
² Faculty of Aeronautic, Technical University, Rampova 7, 041 21 Košice, Slovakia
³ Faculty of Electrical Engineering and Informatics Technical University, Letna 9, 042 00 Košice, Slovakia

Abstract
We have studied dielectric properties (complex permittivity and dielectric loss factor) of a transformer oil ITO 100 based magnetic fluid with various concentrations of magnetic Fe₃O₄ nanoparticles covered with oleic acid as a surfactant. The experiments were carried out at different volume concentrations of magnetite nanoparticles up to 4