Magnetic field dependent resonant light scattering by magnetic spheres in a magnetizable medium

Abstract

The anisotropy factor is a parameter from which one can determine preferential forward and backward light scattering. In the present study, we have calculated anisotropy factor cos θ as a function of magnetic field for magnetic spheres in a magnetic medium. We have noticed resonances in cos θ which indicate preferential enhanced scattering in forward and backward directions. Anisotropy factor is analyzed for various size parameters. The study clearly indicates that scattering can be modulated by means of size parameter of magnetic spheres as well as magnetic field. We have further confirmed the result by studying forward and backward intensity as a function of magnetic field. Resonances noticed in the intensity are in good agreement with the previous argument. This observation can be useful for the magnetic field dependent directional scattering and novel magneto-photonic devices.

The controllable destabilization route for synthesis of low cytotoxic magnetic nanospheres with photonic response

“…Due to their unique physicochemical properties, the applications of these structures in biomedicine (e.g., for magnetic separation of bioobjects 1 – 4 , targeted drug delivery 5 – 10 , and MRI spectroscopy 11 , 12 ) is of particular interest. Also, MNS have prospects in optics and photonics 13 . Because of special requirements for these systems, studies were aimed at the synthesis of nanospheres with a hydrophilic functional surface to facilitate covalent cross-linking with biomolecules and stabilizers.…”