Magnetic configurations of Ni–Cu alloy nanowires obtained by the template method

A general perspective on the magnetization reversal in cylindrical soft magnetic nanowires with dominant shape anisotropy

“…It is worth mentioning the deviation of the experimentally obtained average magnetic moment versus the Ni content from the theoretical linear increase (with a threshold value of Ni content of 0.39), especially in case of samples with low Ni content. This behavior has been explained in [9] via specific elemental mappings by Energy Filtered Transmission Electron Microscopy showing enhanced precipitation of Ni and Cu elements in samples of low Ni content and a reasonable alloying process in samples of higher Ni content (e.g. over 0.75).…”

“…The other material related magnetic parameters have been chosen according to [9], where the magnetic configurations were investigated in arrays of Ni-Cu NWs of different Cu contents. Arrays of NWs consisting of the average formula Ni x Cu 1-x with x=0.2, 0.54, 0.75 and 0.92 have been prepared via the template method and further investigated by SQUID magnetometry at different temperatures.…”

“…1). The stiffness constant A has been also ranged from 7*10 -12 J/m to 1000x10 -12 J/m, with the first value corresponding to Ni 0.92 Cu 0.08 NWs as also estimated in [9] and the last one taken as a limiting case in order to come closer to the Stoner-Wohlfarth (S-W) model implying a magnetic monodomain due to the infinite exchange energy [21].…”

“…By such a technique, both the characteristics of single NWs (type of magnetic material, shape and geometrical parameters) as well as of their forming array (orientation of NWs versus the template surface, density of NWs, etc) can be suitable controlled. It is worth mentioning that the magnetic properties (including the magnetization reversal) of such complex systems depend not only on the magnetic properties of each NW, but also on the way the wires interact among them [8,9]. However, many applications (spintronics, memory devices) assume an array of non-interacting NWs and hence the comprehensive understanding of the magnetization reversal of individual nanowires remains the main concern to be addressed both theoretically and experimentally.…”

Metallic Nanowires and Nanotubes Prepared by Template Replication

“…An example related to nickel alloy nanowire preparation is deposition of nickel copper nanowires [69]. In this case the most demanding step is finding the appropriate conditions for performing the electrodeposition which leads to the desired composition.…”