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Direct device integration of single 1D nanoparticle assemblies; a magnetization reversal and magnetotransport study

Sedrpooshan, Mehran LU ; Bulbucan, Claudiu LU ; Carrad, Damon J. ; Jespersen, Thomas S ; Burke, Adam LU orcid ; Messing, Maria LU and Westerström, Rasmus LU (2025) In Nanotechnology 36(18).
Abstract
Nanochains (NCs) made up of a one-dimensional arrangement of magnetic
anoparticles (NPs) exhibit anisotropic properties with potential for various applications. Herein, using a novel self-assembly method we directly integrate single NCs onto desired substrates including devices. We present a nanoscopic analysis of magnetization reversal in 1D linear NP arrays by combining x-ray microscopy, magnetoresistance (MR), and micromagnetic simulations. Imaging the local magnetization along individual NCs by scanning transmission x-ray microscopy and x-ray magnetic circular dichroism under varying in situ magnetic fields shows
that each structure undergoes distinct non-homogeneous magnetization reversal processes. The experimental... (More)
Nanochains (NCs) made up of a one-dimensional arrangement of magnetic
anoparticles (NPs) exhibit anisotropic properties with potential for various applications. Herein, using a novel self-assembly method we directly integrate single NCs onto desired substrates including devices. We present a nanoscopic analysis of magnetization reversal in 1D linear NP arrays by combining x-ray microscopy, magnetoresistance (MR), and micromagnetic simulations. Imaging the local magnetization along individual NCs by scanning transmission x-ray microscopy and x-ray magnetic circular dichroism under varying in situ magnetic fields shows
that each structure undergoes distinct non-homogeneous magnetization reversal processes. The experimental observations are complemented by micromagnetic simulations, revealing that morphological inhomogeneities critically influence the reversal process where regions with parallel chains or larger multi-domain particles act as nucleation centers for the magnetization switching and smaller particles provide pinning sites for the domain propagation. Magnetotransport through single NCs reveals distinct MR behavior that is correlated with the unique magnetization reversal processes dictated by the morphology of the structures. This study provides new insights into the complex magnetization reversal mechanism inherent to one-dimensional particle assemblies and the effective parameters that govern the process.
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanotechnology
volume
36
issue
18
article number
185601
pages
7 pages
publisher
IOP Publishing
external identifiers
  • pmid:40101303
  • scopus:105002302842
ISSN
0957-4484
DOI
10.1088/1361-6528/adc1d0
language
English
LU publication?
yes
id
2abfd616-8e53-4eed-bf30-9f204bbd67c1
date added to LUP
2025-04-29 14:01:27
date last changed
2025-04-30 10:00:41
@article{2abfd616-8e53-4eed-bf30-9f204bbd67c1,
  abstract     = {{Nanochains (NCs) made up of a one-dimensional arrangement of magnetic <br/> anoparticles (NPs) exhibit anisotropic properties with potential for various applications. Herein, using a novel self-assembly method we directly integrate single NCs onto desired substrates including devices. We present a nanoscopic analysis of magnetization reversal in 1D linear NP arrays by combining x-ray microscopy, magnetoresistance (MR), and micromagnetic simulations. Imaging the local magnetization along individual NCs by scanning transmission x-ray microscopy and x-ray magnetic circular dichroism under varying in situ magnetic fields shows<br/>that each structure undergoes distinct non-homogeneous magnetization reversal processes. The experimental observations are complemented by micromagnetic simulations, revealing that morphological inhomogeneities critically influence the reversal process where regions with parallel chains or larger multi-domain particles act as nucleation centers for the magnetization switching and smaller particles provide pinning sites for the domain propagation. Magnetotransport through single NCs reveals distinct MR behavior that is correlated with the unique magnetization reversal processes dictated by the morphology of the structures. This study provides new insights into the complex magnetization reversal mechanism inherent to one-dimensional particle assemblies and the effective parameters that govern the process.<br/>}},
  author       = {{Sedrpooshan, Mehran and Bulbucan, Claudiu and Carrad, Damon J. and Jespersen, Thomas S and Burke, Adam and Messing, Maria and Westerström, Rasmus}},
  issn         = {{0957-4484}},
  language     = {{eng}},
  number       = {{18}},
  publisher    = {{IOP Publishing}},
  series       = {{Nanotechnology}},
  title        = {{Direct device integration of single 1D nanoparticle assemblies; a magnetization reversal and magnetotransport study}},
  url          = {{http://dx.doi.org/10.1088/1361-6528/adc1d0}},
  doi          = {{10.1088/1361-6528/adc1d0}},
  volume       = {{36}},
  year         = {{2025}},
}