The influence of the template-assisted electrodeposition parameters on the structure and magnetic properties of Co-Ru alloy nanowire arrays

• Published in: Journal of alloys and compounds Vol. 1017; p. 179179
• Main Authors: Dobosz, Iwona, Kac, Malgorzata, Kutyła, Dawid, Włoch, Grzegorz
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.02.2025
• Subjects: Anodic alumina membrane; Cobalt; Nanowires; Ruthenium; Ruthenium; Nanowires; Cobalt; Anodic alumina membrane
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2025.179179

We studied the magnetic properties of Co-Ru alloy nanowire arrays synthesized by electrochemical deposition technique into anodic alumina membrane (AAM) templates. Nanowires with diameters of 55 and 100 nm and different lengths were electrodeposited at constant cathodic potentials ranging from −0.6 V to −0.85 V vs. SCE. Higher cathodic potential caused an increase in the cobalt content while decreasing the ruthenium concentration. Moreover, the applied potential influenced the nanowire morphology and membrane filling degree. X-ray diffraction studies revealed the polycrystalline hcp Co-based structure of nanowires with Ru precipitates. The diffractograms showed an increase in the lattice parameter (compared to pure Co hcp structure), most pronounced in the sample deposited at the lowest potentials (showing the largest Ru content). The various chemical compositions of nanowires resulted in the modification of their magnetic properties. The coercivity value and squareness increased with increasing cathodic overpotential. Electrodeposition of Co-Ru alloy nanowires is not an easy task and only a few groups have undertaken this subject, but without performing magnetic analysis of this system. [Display omitted] •Co-Ru alloy nanowire arrays were electrodeposited in anodic alumina membranes.•Changes in the cathodic potentials affected the nanowire composition and morphology.•A small addition of Ru stabilized the hcp structure, even at a very low pH.•Morphology and chemical composition influenced the magnetic properties of nanowires.•An increase in cathodic potentials resulted in greater coercivity and squareness.