Determination of Faraday rotation in a ferrofluid

Photonic Hall effect in ferrofluids: Theory and experiments

“…In the absence of an applied magnetic field, ferrofluids behave as a normal liquid, and no birefringence or dichroism, circular or linear, are expected to be present. The application of a magnetic field introduces magneto-optical anisotropy, which has been the subject of many experimental studies [15,16]. In the longitudinal configuration, in which the wave vector of the incident light is directed along the applied magnetic field, the eigenmodes of the electric field are circularly polarized waves.…”

Magnetically induced optical activity and dichroism of gadolinium oxide nanoparticle–based ferrofluids

“…11 The calibration and measurements were made as per the procedure reported elsewhere. 18 Effectively, the results are characterized by a monotonic increase of h, with the field followed by a saturation trend in the region of higher field strength. In the presence of an external field, the magnetic moments of the MNPs in the fluid tend to orient along the field direction, forming, thereby, long chains through dipole-dipole interaction.…”

Synthesis and Faraday Effect of Fe-Al Oxide Composite Ferrofluid

“…The Faraday effect of ferrofluid containing Fe-Al oxide particles with mass proportion of Fe: Al 2 O 3 = 3:1 thermally treated at 300˚C does not saturate at high magnetic field in our experiments. It was suggested by Nihad A. Yusuf et al that Faraday effect had a saturation onset at fields 2000 G and have not reached saturation in field up to 4000 G for diluted (Ms = 20 G) Fe 3 O 4 particle ferrofluid with diester as a carrier liquid [18]. In this paper, the Fe 3 O 4 /Fe 2 O 3 /Al 2 O 3 particle [25] ferrofluid was used, such diluted particle ferrorfluids containing Fe-Al oxide particles (Fe: Al 2 O 3 = 3:1) thermally treated at 300˚C placed from 0 to 1.5 T magnetic field have an excellent Faraday effects without saturation.…”

“…Janssen et al mentioned that the scattering of the permanent magnetic moment in ferrofluid placed in magnetic field would lead to a new description of the Faraday rotation and the circular dichroism [15]. If a polarized light passes through the ferrofluid along the direction of magnetic field, an excellent Faraday effect is observed [16]- [18], which usually follows a Langevin type behavior [16] [19]. Faraday effect saturate at high magnetic field limits the applications of ferrofluid in high magnetic fields.…”