Optimization of the magnetic properties of aligned Co nanowires/polymer composites for the fabrication of permanent magnets

International audienceWe aim at combining high coercivity magnetic nanowires in a polymer matrix in a view to fabricate rare-­‐earth free bonded magnets. In particular, our aim is to fabricate anisotropic materials by aligning the wires in the polymer matrix. We have explored the different parameters of the fabrication process in order to produce a material with the best possible magnetic properties. We show that the choice of a proper solvent allows obtaining stable nanowire suspensions. The length and the type of the polymer chains play also an important role. Smaller chains (M w