Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications
- Univ. of Cambridge (United Kingdom). Cavendish Lab.
- Eindhoven Univ. of Technology (Netherlands). Dept. of Applied Physics
- Univ. of Cambridge (United Kingdom). Dept. of Chemistry
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research
Three-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. In conclusion, 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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; Royal Society
- Grant/Contract Number:
- AC05-00OR22725; RG170262
- OSTI ID:
- 1470874
- Journal Information:
- Nanomaterials, Vol. 8, Issue 7; ISSN 2079-4991
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
3D nanoprinting via focused electron beams
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journal | June 2019 |
Launching a new dimension with 3D magnetic nanostructures
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journal | January 2020 |
Focused Electron Beam-Based 3D Nanoprinting for Scanning Probe Microscopy: A Review
|
journal | December 2019 |
Magnetic nanowires and nanotubes | text | January 2018 |
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