MAGNETO-DIELECTRIC ANISOTROPY IN MAGNETIC FLUIDS DETERMINED FROM MAGNETOOPTICAL MEASUREMENTS

Magneto-optical measurements on magnetic fluids have been utilized to determine the magneto-dielectric anisotropy seen by light polarized in the direction of the effect in magnetic fluids. Our results show that the dielectric constant, epsilon(parallel to ), applied magnetic fie ld increases with the field, while epsilon(perpendicular to) seen by light polarized normal to the field decreases with the field. Moreover , the results also show that epsilon(parallel to) exhibits a peak wit h temperature while epsilon(perpendicular to) exhibits a minimum. Our calculated results are in good agreement with those obtained using co nventional impedance measurement techniques, with the advantage that t his method is not affected by the electrode effect, parasitic impedanc es, skin depth and accuracy-related problems that are typical of conve ntional impedance measurement techniques.