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Title: Fabrication of Scaffold-Based 3D Magnetic Nanowires for Domain Wall Applications

Journal Article · · Nanomaterials
DOI:https://doi.org/10.3390/nano8070483· OSTI ID:1470874
 [1];  [2];  [3];  [1];  [1]; ORCiD logo [4]; ORCiD logo [4];  [3];  [3];  [2]; ORCiD logo [1]
  1. Univ. of Cambridge (United Kingdom). Cavendish Lab.
  2. Eindhoven Univ. of Technology (Netherlands). Dept. of Applied Physics
  3. Univ. of Cambridge (United Kingdom). Dept. of Chemistry
  4. 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
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (4)

3D nanoprinting via focused electron beams journal June 2019
Launching a new dimension with 3D magnetic nanostructures 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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