Cadmium-ferrite-based magnetic fluid: birefringence and transmission electron microscopy investigation

In this paper, a new hydrocarbon-based magnetic fluid containing CdFe/sub 2/O/sub 4/ nanoparticles was investigated using static magnetic birefringence (SMB) and transmission electron microscopy. Inclusion of the dependence of the birefringence signal upon both the magnetic permeability and the formation of chain-like structures yields excellent agreement between the SMB data and the model used to fit them.