Abstract
The enormous progress of synthesis and characterization of magnetic materials facilitated an immense increase in storage density and enabled a gigantic boom within the computer industry in terms of Moore’s law.[1] Most notably, this development is based on the possibility to design shape-controlled nanostructures, such as nanowires.[2,3] Furthermore, due to the discovery of the giant magnetoresistance effect, it was possible to achieve improvement in the field of sensor devices, mainly in the fabrication of read heads for hard drives.[4,5,6]
We have investigated the production of multilayered cobalt/copper as well as cobalt/platinum nanowires by a well-known electrochemical route, using track etched polycarbonate templates. The periodicity of the segment length of each material component varied along the wire axis in magnitude when applying deposition pulses of constant duration. To obtain metal segments of same length, we have analyzed diffusion processes and developed a pulse deposition technique that allows compensating for limitations due to mass transport during the electrochemical growth process.
