Static magneto optical birefringence of new electric double layered magnetic fluids

Magnetic birefringence measurements are performed under a static field on E lectric Double Layered Magnetic Fluids based on copper and zinc ferrite nan ostructures. The optical birefringence is related to a single-particle effe ct and well described by a Langevin model which includes a lognormal distri bution of particles. By the field-induced birefringence level, these new ma gnetic fluids are comparable to usual ones, a result which could offer a ne w way for biological applications.