Nielsch, K., Müller, F., Liu, G., Wehrspohn, R. B., Gösele, U. and Fischer, S. F., Kronmüller, H.
Magnetic nanowire arrays obtained by electro-deposition in ordered alumina templates
Electrochemical Society Proceedingspp 13 (Eds.) Andricacos, P. C., Searson, P. C., Reidsema-Simpson, C., Allongue, P., Stickney, J.L. and Oleszek, G. M.,Pennington, USA (2000)
Nickel and Cobalt nanowires were grown in highly ordered pores of anodic alumina membranes using pulsed electrodeposition. The hexagonally arranged pore matrices were fabricated by self-patterning in two successive anodization processes. Before the filling process, the insulating barrier layer at the bottom of the membrane was thinned homogeneously by current-limited anodization steps. During the deposition from a Watts bath two short millisecond deposition pulses were applied, followed by a comparatively long delay time to attain quite a high metal ion concentration at the deposition interface. This technique yielded completely metal-filled alumina membranes, wich were analyzed by scanning electron microscopy and X-ray diffraction. The magnetic behavior of the metal-filled nano-pore arrays was characterized by SQUID-magnetometer measurements and the coupling between the nanowires was analyzed.