Investigation of optical properties of ferrofluid by using magneto-optical transmission and linear dichroism

Magneto-optical studies of kerosene based ferrofluid

“…As a result, the intensity of transmitted light is reduced, and absorption rises. [11] The magnetic dipole energy of ferrofluid rises with the strength of the applied magnetic field and saturates when the applied field reaches a critical point [29]. In such situation the magnetic particles have the tendency to chain formation and finally saturate at high fields.…”

“…In the absence of an external magnetic field, ferrofluid is optically isotropic; nevertheless, once the external field is added, they display anisotropic behaviour and indicate Linear dichroism, Faraday rotation, birefringence, magneto-optical transmission, and other magneto-optic phenomena. [8,9,10,11]. When a magnetic field is added, however, the particles may orient in the field direction, resulting in structurally anisotropic magnetic fluids [12,13].…”

“…Individual magnetic particles intrinsic optical anisotropy or shape anisotropy is the basic cause of linear dichroism [10,12]. The intensity of transmitted light is different for the direction of polarization [11]. The aggregate form of particles in a ferrofluid can act as oscillating dipoles.…”