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Exotic Transverse-Vortex Magnetic Configurations in CoNi Nanowires
- Source :
- ACS Nano, ACS Nano, American Chemical Society, 2020, 14 (2), pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩, ACS Nano, American Chemical Society, 2019, 14, pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩, ACS Nano, 2019, 14 (2), pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- The magnetic configurations of cylindrical Co-rich CoNi nanowires have been quantitatively analyzed at the nanoscale by electron holography and correlated to local structural and chemical properties. The nanowires display grains of both face-centered cubic (fcc) and hexagonal close packed (hcp) crystal structures, with grain boundaries parallel to the nanowire axis direction. Electron holography evidences the existence of a complex exotic magnetic configuration characterized by two distinctly different types of magnetic configurations within a single nanowire: an array of periodical vortices separating small transverse domains in hcp-rich regions with perpendicular easy axis orientation and a mostly axial configuration parallel to the nanowire axis in regions with fcc grains. These vastly different domains are found to be caused by local variations in the chemical composition modifying the crystalline orientation and/or structure, which give rise to change in magnetic anisotropies. Micromagnetic simulations, including the structural properties that have been experimentally determined, allow for a deeper understanding of the complex magnetic states observed by electron holography.
- Subjects :
- Materials science
electron holography
Nanowire
FOS: Physical sciences
General Physics and Astronomy
Physics::Optics
Applied Physics (physics.app-ph)
02 engineering and technology
010402 general chemistry
01 natural sciences
Electron holography
Condensed Matter::Materials Science
magnetic configuration
vortex state
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Perpendicular
[CHIM.CRIS]Chemical Sciences/Cristallography
General Materials Science
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
micromagnetic simulation
ComputingMilieux_MISCELLANEOUS
Condensed Matter - Mesoscale and Nanoscale Physics
Condensed matter physics
nanocylinder
General Engineering
Close-packing of equal spheres
Physics - Applied Physics
021001 nanoscience & nanotechnology
Vortex state
0104 chemical sciences
Vortex
Magnetic anisotropy
[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Grain boundary
magnetic nanowire
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 19360851
- Database :
- OpenAIRE
- Journal :
- ACS Nano, ACS Nano, American Chemical Society, 2020, 14 (2), pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩, ACS Nano, American Chemical Society, 2019, 14, pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩, ACS Nano, 2019, 14 (2), pp.1399-1405. ⟨10.1021/acsnano.9b07448⟩
- Accession number :
- edsair.doi.dedup.....394597f9cad008323a39d84a85057846