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Template-free generation and integration of functional 1D magnetic nanostructures

Sedrpooshan, Mehran LU ; Bulbucan, Claudiu LU ; Ternero, Pau LU ; Maltoni, Pierfrancesco ; Preger, Calle LU orcid ; Finizio, Simone ; Watts, Benjamin ; Peddis, Davide ; Burke, Adam LU orcid and Messing, Maria LU , et al. (2023) In Nanoscale
Abstract
The direct integration of 1D magnetic nanostructures into electronic circuits is crucial for realizing their great potential as components in magnetic storage, logical devices, and spintronic applications. Here, we present a novel template-free technique for producing magnetic nanochains and nanowires using directed self-assembly of gas-phase-generated metallic nanoparticles. The 1D nanostructures can be self-assembled along most substrate surfaces and can be freely suspended over micrometer distances, allowing for direct incorporation into different device architectures. The latter is demonstrated by a one-step integration of nanochains onto a pre-patterned Si chip and the fabrication of devices exhibiting magnetoresistance. Moreover,... (More)
The direct integration of 1D magnetic nanostructures into electronic circuits is crucial for realizing their great potential as components in magnetic storage, logical devices, and spintronic applications. Here, we present a novel template-free technique for producing magnetic nanochains and nanowires using directed self-assembly of gas-phase-generated metallic nanoparticles. The 1D nanostructures can be self-assembled along most substrate surfaces and can be freely suspended over micrometer distances, allowing for direct incorporation into different device architectures. The latter is demonstrated by a one-step integration of nanochains onto a pre-patterned Si chip and the fabrication of devices exhibiting magnetoresistance. Moreover, fusing the nanochains into nanowires by post-annealing significantly enhances the magnetic properties, with a 35% increase in the coercivity. Using magnetometry, X-ray microscopy, and micromagnetic simulations, we demonstrate how variations in the orientation of the magnetocrystalline anisotropy and the presence of larger multi-domain particles along the nanochains play a key role in the domain formation and magnetization reversal. Furthermore, it is shown that the increased coercivity in the nanowires can be attributed to the formation of a uniform magnetocrystalline anisotropy along the wires and the onset of exchange interactions. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
magnetic nanostructures, functional materials, Aerosols, Magneto-transport, nanoparticle deposition, self-assembled, nanomagnetism, x-ray microscopy, STXM-XMCD, gas-phase synthesis, spark ablation, Micromagnetic simulation
in
Nanoscale
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85176744819
  • pmid:37942933
ISSN
2040-3372
DOI
10.1039/d3nr03878e
language
English
LU publication?
yes
id
177eb1d8-61f1-4359-a1e1-23368936f36d
date added to LUP
2023-11-22 10:59:18
date last changed
2024-02-22 04:09:22
@article{177eb1d8-61f1-4359-a1e1-23368936f36d,
  abstract     = {{The direct integration of 1D magnetic nanostructures into electronic circuits is crucial for realizing their great potential as components in magnetic storage, logical devices, and spintronic applications. Here, we present a novel template-free technique for producing magnetic nanochains and nanowires using directed self-assembly of gas-phase-generated metallic nanoparticles. The 1D nanostructures can be self-assembled along most substrate surfaces and can be freely suspended over micrometer distances, allowing for direct incorporation into different device architectures. The latter is demonstrated by a one-step integration of nanochains onto a pre-patterned Si chip and the fabrication of devices exhibiting magnetoresistance. Moreover, fusing the nanochains into nanowires by post-annealing significantly enhances the magnetic properties, with a 35% increase in the coercivity. Using magnetometry, X-ray microscopy, and micromagnetic simulations, we demonstrate how variations in the orientation of the magnetocrystalline anisotropy and the presence of larger multi-domain particles along the nanochains play a key role in the domain formation and magnetization reversal. Furthermore, it is shown that the increased coercivity in the nanowires can be attributed to the formation of a uniform magnetocrystalline anisotropy along the wires and the onset of exchange interactions.}},
  author       = {{Sedrpooshan, Mehran and Bulbucan, Claudiu and Ternero, Pau and Maltoni, Pierfrancesco and Preger, Calle and Finizio, Simone and Watts, Benjamin and Peddis, Davide and Burke, Adam and Messing, Maria and Westerström, Rasmus}},
  issn         = {{2040-3372}},
  keywords     = {{magnetic nanostructures; functional materials; Aerosols; Magneto-transport; nanoparticle deposition; self-assembled; nanomagnetism; x-ray microscopy; STXM-XMCD; gas-phase synthesis; spark ablation; Micromagnetic simulation}},
  language     = {{eng}},
  month        = {{11}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Nanoscale}},
  title        = {{Template-free generation and integration of functional 1D magnetic nanostructures}},
  url          = {{http://dx.doi.org/10.1039/d3nr03878e}},
  doi          = {{10.1039/d3nr03878e}},
  year         = {{2023}},
}