Magnets are inevitable from our lives. They are omnipresent in different forms in various appliances. Incessant research works are carried out in magnetic materials by researchers to enhance the performance of magnetic materials. Two systems viz. a soft Fe-Co and hard Sm-Co were selected and a few challenges were addressed in the syntheses and shape modifications which determines the magnetic properties of these materials. The effects of surfactant chemistry in modifying the morphology of Fe-Co nanoparticles from nucleated seeds to spheres, rectangular particles in three...