Photonic hall effect in ferrofluids: theory and experiments
An experimental and theoretical study on the photonic Hall effect (PHE) in liquid and gelled samples of ferrofluids is presented. The ferrofluids are aqueous colloidal suspensions of Fe2CoO4 particles, which can be considered as anisotropic and absorbing Rayleigh scatterers. The PHE is found to be produced by the orientation of the magnetic moments of the particles, as is also the case for the Faraday effect. The dependence of the PHE with respect to the concentration of the scatterers, the magnetic field, and the polarization of the incident light is measured in liquid and in gelled samples, and is compared to a simple model based on the use of a scattering matrix and the single scattering approximation.
Lacoste
D
Department of Physics, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104-6396, USA.
Donatini
F
Neveu
S
Serughetti
JA
Van Tiggelen BA