Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications
AbstractThree-dimensional magnetic nanostructures hold great potential to revolutionize information technologies and to enable the study of novel physical phenomena. In this work, we describe a hybrid nanofabrication process combining bottom-up 3D nano-printing and top-down thin film deposition, which leads to the fabrication of complex magnetic nanostructures suitable for the study of new 3D magnetic effects. First, a non-magnetic 3D scaffold is nano-printed using Focused Electron Beam Induced Deposition; then a thin film magnetic material is thermally evaporated onto the scaffold, leading to a functional 3D magnetic nanostructure. Scaffold geometries are extended beyond recently developed single-segment geometries by introducing a dual-pitch patterning strategy. Additionally, by tilting the substrate during growth, low-angle segments can be patterned, circumventing a major limitation of this nano-printing process; this is demonstrated by the fabrication of ‘staircase’ nanostructures with segments parallel to the substrate. The suitability of nano-printed scaffolds to support thermally evaporated thin films is discussed, outlining the importance of including supporting pillars to prevent deformation during the evaporation process. Employing this set of methods, a set of nanostructures tailored to precisely match a dark-field magneto-optical magnetometer have been fabricated and characterized. This work demonstrates the versatility of this hybrid technique and the interesting magnetic properties of the nanostructures produced, opening a promising route for the development of new 3D devices for applications and fundamental studies. View Full-Text
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Sanz-Hernández, D.; Hamans, R.F.; Osterrieth, J.; Liao, J.-W.; Skoric, L.; Fowlkes, J.D.; Rack, P.D.; Lippert, A.; Lee, S.F.; Lavrijsen, R.; Fernández-Pacheco, A. Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications. Nanomaterials 2018, 8, 483.
Sanz-Hernández D, Hamans RF, Osterrieth J, Liao J-W, Skoric L, Fowlkes JD, Rack PD, Lippert A, Lee SF, Lavrijsen R, Fernández-Pacheco A. Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications. Nanomaterials. 2018; 8(7):483.Chicago/Turabian Style
Sanz-Hernández, Dédalo; Hamans, Ruben F.; Osterrieth, Johannes; Liao, Jung-Wei; Skoric, Luka; Fowlkes, Jason D.; Rack, Philip D.; Lippert, Anna; Lee, Steven F.; Lavrijsen, Reinoud; Fernández-Pacheco, Amalio. 2018. "Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications." Nanomaterials 8, no. 7: 483.
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