NickelMaghrebV1, Main, Exploration, bibRecord, 000119

Crystal structure, microstructure and magnetic properties of Ni nanoparticles elaborated by hydrothermal route

Identifieur interne : 000119 ( Main/Exploration ); précédent : 000118; suivant : 000120

Crystal structure, microstructure and magnetic properties of Ni nanoparticles elaborated by hydrothermal route

Auteurs : A. Bouremana [Algérie] ; A. Guittoum [Algérie] ; M. Hemmous [Algérie] ; B. Rahal [Algérie] ; J. J. Sunol [Espagne] ; D. Martinez-Blanco [Espagne] ; J. A. Blanco [Espagne] ; Pedro Gorria [Espagne] ; N. Benrekaa [Algérie]

Source :

Journal of magnetism and magnetic materials [ 0304-8853 ] ; 2014.

RBID : Pascal:14-0088923

Descripteurs français

Pascal (Inist)
- Structure cristalline, Microstructure, Hystérésis magnétique, Synthèse hydrothermale, Synthèse nanomatériau, Diffraction RX, Microscopie électronique balayage, Spectrométrie dispersive, Aimantation saturation, Morphologie, Force coercitive, Nickel, Nanoparticule, Réseau cubique.
Wicri :
- topic : Nickel.

English descriptors

KwdEn :
- Coercive force, Crystal structure, Cubic lattices, Dispersive spectrometry, Hydrothermal synthesis, Magnetic hysteresis, Microstructure, Morphology, Nanomaterial synthesis, Nanoparticles, Nickel, Saturation magnetization, Scanning electron microscopy, XRD.

Abstract

We report on the crystal structure, microstructure and magnetic properties of Ni nanoparticles (NPs), with an average diameter of around 40 nm, produced by hydrothermal method. A series of Ni powders was synthesized at relatively low temperature (140 C) by varying the NaOH concentration. The crystal structure, microstructure and magnetic properties were investigated by means of XRD, MEB coupled to EDX and VSM magnetometry. The XRD patterns show Bragg reflections corresponding to Ni with face centred cubic (fcc) crystal structure. EDX spectra confirm the purity of Ni powders. Moreover, the SEM micrographs show that the Ni-NPs are agglomerated forming entities of 1-5 μm in average size with different morphologies that change as the NaOH concentration increases. While those entities exhibit a flower-like form at the lowest concentration, a dendritic shape appears for the highest one. The room temperature values for the coercive field ( < 200 Oe) and saturation magnetization ( ≃ 52 Am²/kg) were obtained from the magnetic hysteresis loops. We discuss about the influence of the particle morphology on the magnetic behaviour.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Coercive force</term>
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<term>Magnetic hysteresis</term>
<term>Microstructure</term>
<term>Morphology</term>
<term>Nanomaterial synthesis</term>
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<term>Nickel</term>
<term>Saturation magnetization</term>
<term>Scanning electron microscopy</term>
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<term>Microstructure</term>
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<term>Synthèse nanomatériau</term>
<term>Diffraction RX</term>
<term>Microscopie électronique balayage</term>
<term>Spectrométrie dispersive</term>
<term>Aimantation saturation</term>
<term>Morphologie</term>
<term>Force coercitive</term>
<term>Nickel</term>
<term>Nanoparticule</term>
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<front><div type="abstract" xml:lang="en">We report on the crystal structure, microstructure and magnetic properties of Ni nanoparticles (NPs), with an average diameter of around 40 nm, produced by hydrothermal method. A series of Ni powders was synthesized at relatively low temperature (140 C) by varying the NaOH concentration. The crystal structure, microstructure and magnetic properties were investigated by means of XRD, MEB coupled to EDX and VSM magnetometry. The XRD patterns show Bragg reflections corresponding to Ni with face centred cubic (fcc) crystal structure. EDX spectra confirm the purity of Ni powders. Moreover, the SEM micrographs show that the Ni-NPs are agglomerated forming entities of 1-5 μm in average size with different morphologies that change as the NaOH concentration increases. While those entities exhibit a flower-like form at the lowest concentration, a dendritic shape appears for the highest one. The room temperature values for the coercive field ( < 200 Oe) and saturation magnetization ( ≃ 52 Am<sup>2</sup>
/kg) were obtained from the magnetic hysteresis loops. We discuss about the influence of the particle morphology on the magnetic behaviour.</div>
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<name sortKey="Blanco, J A" sort="Blanco, J A" uniqKey="Blanco J" first="J. A." last="Blanco">J. A. Blanco</name>
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<name sortKey="Martinez Blanco, D" sort="Martinez Blanco, D" uniqKey="Martinez Blanco D" first="D." last="Martinez-Blanco">D. Martinez-Blanco</name>
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Crystal structure, microstructure and magnetic properties of Ni nanoparticles elaborated by hydrothermal route

Crystal structure, microstructure and magnetic properties of Ni nanoparticles elaborated by hydrothermal route

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri