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Metallic barcode nanowires (BNWs) composed of repeating heterogeneoussegments fabricated by template-assisted electrodeposition can offer extendedfunctionality in magnetic, electrical, mechanical, and biomedical applications.We can consider such nanostructures as a three-dimensional system ofmagnetically interacting elements with magnetic behavior strongly affected bycomplex magnetostatic interactions. This study discusses the influence ofgeometrical parameters of segments on the character of their interactions andthe overall magnetic behavior of the array of BNWs having alternatingmagnetization. By controlling the applied current densities and the elapsedtime in the electrodeposition, we regulate the dimension of the Fe-Au BNWs. Weshow that the Fe and Au segments are made of Fe-Au alloys with high and lowmagnetization. With the help of micromagnetic simulations, we discover andanalyze the three types of magnetostatic interactions in the BNW arrays. As aresult, we demonstrate that the dominating type of interaction depends on thegeometric parameters of the Fe and Au segments and the interwire and intrawiredistances.

Interwire and Intrawire Magnetostatic Interactions in Fe-Au Barcode Nanowires with Alternating Ferromagnetically Strong and Weak Segments