AN APPROACH TO MEASURMENT OF PERMEABILITY/PERMITTIVITY TENSOR OF FERROFLUIDS

Daniel Mayer

   The magnetic field acting on the ferrofluids causes microstructural conversions that result in a change of permeability ferrofluids. For this physical phenomenon introduce labelling field induced magnetic. For ferrofluids which are in the state FIMA is described the experimental method for the examination of their permeability tensor. It is also described analogous phenomenon in where there is a change of permittivity ferrofluids. We call it field induced dielectric anisotropy (FIDA). The contribution describes the method of measuring of the permittivity tensor. It can be expected that the FIMA and FIDA of ferrofluids will find interesting applications in designing of various sensors, in measurement technology, in mechatronic and in other areas of practice.

Keywords: ferrofluids, induced anisotropy, permeability (permittivity) tensor, frozen anisotropy

[full-paper]