Arrays of bi-metal nanostructures to control energy product

Bi-metal magnetic nanostructures have been deposited within porous silicon to influence the magnetic switching behavior of the porous silicon/metal nanocomposite. These magnetic nanocomposites consisting of two ferromagnetic metals have been achieved by two different routes. On the one hand both metals have been deposited alternatingly out of one solution by changing the potential and on the other hand the two metals have been deposited by using different metal salt solutions. The latter system shows two distinct slopes of the hysteresis curves due to the different saturation behavior of the two types of deposited metal, whereas the system produced from one electrolyte shows no kink which indicates exchange coupling between the two metals. By tuning the amount of each metal the energy product of the systems can be controlled.