CobaltMaghrebV1, France, Analysis, bibRecord, 000021

Structural and magnetic properties of cobalt nanostructures on SiO2/Si(111) substrates

Identifieur interne : 000021 ( France/Analysis ); précédent : 000020; suivant : 000022

Structural and magnetic properties of cobalt nanostructures on SiO2/Si(111) substrates

Auteurs : W. Bounour-Bouzamouche [France, Algérie] ; S. M. Cherif [France] ; S. Farhat [France] ; Y. Roussigne [France] ; A. Tallaire [France] ; A. Gicquel [France] ; C. P. Lungu [Roumanie] ; M. Guerioune [Algérie]

Source :

Applied surface science [ 0169-4332 ] ; 2014.

RBID : Pascal:15-0015881

Descripteurs français

Pascal (Inist)
- Cobalt, Métal transition, Nanostructure, Silicium, Autoassemblage, Oxyde de silicium, Co, O Si, SiO2, Si, Composé minéral.
Wicri :
- topic : Cobalt, Composé minéral.

English descriptors

KwdEn :
- Cobalt, Inorganic compounds, Nanostructures, Self-assembly, Silicon, Silicon oxides, Transition elements.

Abstract

2D architectures of cobalt onto silicon (111) surfaces were elaborated by patterning of magnetic cobalt in the nanometer scale. A continuous cobalt layer of 1, 3 and 10 nm thickness, respectively, was first deposited by means of thermoionic vacuum arc technique and then, thermally annealed in vacuum at temperatures ranging from 450 to 800°C. Surface structure was analyzed by atomic force and field emission-scanning electron microscopies. Above 750°C, regular triangular shape cobalt nanostructures are formed with pattern dimensions varying between 10 and 200 nm. Good control of shape and packing density could be achieved by adjusting the initial thickness and the thermal and hydrogen plasma treatments. Magnetic properties were investigated using vibrating sample magnetometer technique. The evolution of the coercive field versus packing density and dimensions of the nanostructures was studied and compared to micromagnetic calculations. The observed nanostructures have been modeled by a series of shapes tending to a fractal curve.

Affiliations:

Links toward previous steps (curation, corpus...)

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Pascal:15-0015881

Le document en format XML

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<term>Transition elements</term>
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<term>Nanostructure</term>
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<term>Oxyde de silicium</term>
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<term>O Si</term>
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<front><div type="abstract" xml:lang="en">2D architectures of cobalt onto silicon (111) surfaces were elaborated by patterning of magnetic cobalt in the nanometer scale. A continuous cobalt layer of 1, 3 and 10 nm thickness, respectively, was first deposited by means of thermoionic vacuum arc technique and then, thermally annealed in vacuum at temperatures ranging from 450 to 800°C. Surface structure was analyzed by atomic force and field emission-scanning electron microscopies. Above 750°C, regular triangular shape cobalt nanostructures are formed with pattern dimensions varying between 10 and 200 nm. Good control of shape and packing density could be achieved by adjusting the initial thickness and the thermal and hydrogen plasma treatments. Magnetic properties were investigated using vibrating sample magnetometer technique. The evolution of the coercive field versus packing density and dimensions of the nanostructures was studied and compared to micromagnetic calculations. The observed nanostructures have been modeled by a series of shapes tending to a fractal curve.</div>
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Structural and magnetic properties of cobalt nanostructures on SiO2/Si(111) substrates

Structural and magnetic properties of cobalt nanostructures on SiO2/Si(111) substrates

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Descripteurs français

English descriptors

Abstract

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