CobaltMaghrebV1, Main, Exploration, bibRecord, 000865

Zn1-xCoxO diluted magnetic semiconductors synthesized under hydrothermal conditions

Identifieur interne : 000865 ( Main/Exploration ); précédent : 000864; suivant : 000866

Zn1-xCoxO diluted magnetic semiconductors synthesized under hydrothermal conditions

Auteurs : M. Bouloudenine [France, Algérie] ; N. Viart [France] ; S. Colis [France] ; A. Dinia [France]

Source :

Catalysis today [ 0920-5861 ] ; 2006.

RBID : Pascal:06-0371434

Descripteurs français

Pascal (Inist)
- Semiconducteur, Condition hydrothermale, Métal transition composé, Film, Catalyse hétérogène, Zinc Oxyde, Cobalt Oxyde.

English descriptors

KwdEn :
- Cobalt Oxides, Film, Heterogeneous catalysis, Hydrothermal condition, Semiconductor materials, Transition element compounds, Zinc Oxides.

Abstract

Polycrystalline Zn_1-xCo_xO magnetic semiconductors were synthesized by hydrothermal technique from aqueous solutions of Zn and Co acetates using potassium hydroxide KOH as hydrolytic catalyst. The structural and magnetic properties of the samples were investigated as a function of acetates and KOH concentrations. The results show that the highest amount of Co that can be successfully inserted in the ZnO matrix is around 10%, when using concentrations of 0.5 and 0.77 mol/L of acetate and KOH, respectively. For the Zn_0.9Co_0.1O sample, X-ray diffraction indicates a pure ZnO würtzite structure free of parasitic phases in agreement with optical measurements that reveal the presence of Co²⁺ cations in substitution of Zn²⁺. The magnetization measurements show a paramagnetic behaviour and no evidence of ferromagnetism. This may be due to the absence of free carriers.

Affiliations:

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Le document en format XML

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O diluted magnetic semiconductors synthesized under hydrothermal conditions</title>
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O diluted magnetic semiconductors synthesized under hydrothermal conditions</title>
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<series><title level="j" type="main">Catalysis today</title>
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<term>Semiconductor materials</term>
<term>Transition element compounds</term>
<term>Zinc Oxides</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Semiconducteur</term>
<term>Condition hydrothermale</term>
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<front><div type="abstract" xml:lang="en">Polycrystalline Zn<sub>1-x</sub>
Co<sub>x</sub>
O magnetic semiconductors were synthesized by hydrothermal technique from aqueous solutions of Zn and Co acetates using potassium hydroxide KOH as hydrolytic catalyst. The structural and magnetic properties of the samples were investigated as a function of acetates and KOH concentrations. The results show that the highest amount of Co that can be successfully inserted in the ZnO matrix is around 10%, when using concentrations of 0.5 and 0.77 mol/L of acetate and KOH, respectively. For the Zn<sub>0.9</sub>
Co<sub>0.1</sub>
O sample, X-ray diffraction indicates a pure ZnO würtzite structure free of parasitic phases in agreement with optical measurements that reveal the presence of Co<sup>2+</sup>
 cations in substitution of Zn<sup>2+</sup>
. The magnetization measurements show a paramagnetic behaviour and no evidence of ferromagnetism. This may be due to the absence of free carriers.</div>
</front>
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Zn1-xCoxO diluted magnetic semiconductors synthesized under hydrothermal conditions

Zn1-xCoxO diluted magnetic semiconductors synthesized under hydrothermal conditions

Source :

Descripteurs français

English descriptors

Abstract

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

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