Tuning the response of magnetic suspensions

Electrochemical template synthesis of multilayer nanowires consisting of alternating ferromagnetic and nonmagnetic layers provides an approach to control the properties of magnetic particles in suspension. Copper/nickel multilayer nanowires were fabricated by electrochemical deposition from a solution containing both nickel and copper ions. We demonstrate that the magnetic shape anisotropy and dipolar interactions between magnetic layers can be exploited to tailor the magnetic response in ferromagnetic/nonmagnetic multilayer nanowires in a suspension. (C) 2003 American Institute of Physics.