CobaltMaghrebV1, France, Analysis, bibRecord, 000336

Preparation and characterization of the spinel series Co6+xNi4-xMn8O24 (0≤x≤4)

Identifieur interne : 000336 ( France/Analysis ); précédent : 000335; suivant : 000337

Preparation and characterization of the spinel series Co6+xNi4-xMn8O24 (0≤x≤4)

Auteurs : C. Boudaya [Tunisie] ; L. Laroussi [Tunisie] ; E. Dhahri [Tunisie] ; J. C. Joubert [France] ; A. Cheikh-Rouhou [Tunisie]

Source :

Phase transitions : (Print) [ 0141-1594 ] ; 1999.

RBID : Pascal:00-0244953

Descripteurs français

Pascal (Inist)
- Etude expérimentale, Préparation, Frittage, Microstructure, Structure cristalline, Aimantation, Point Curie, Transition magnétique, Effet concentration, Diffraction RX, SEM, Spinelles, Cobalt oxyde, Nickel oxyde, Manganèse oxyde, Composé quaternaire, Co6+xNi4-xMn8O24, Co Mn Ni O, 6166F, 7530K.

English descriptors

KwdEn :
- Cobalt oxides, Crystal structure, Curie point, Experimental study, Magnetic transitions, Magnetization, Manganese oxides, Microstructure, Nickel oxides, Preparation, Quantity ratio, Quaternary compounds, SEM, Sintering, Spinels, XRD.

Abstract

Samples of the spinel series, Co_6+xNi_4-xMn₈O₂₄ (0≤x≤4), prepared by traditional ceramic procedures, are characterized by X-ray diffraction, SEM techniques and magnetization measurements. In the whole concentration range, a single-phase cubic spinels are obtained at a sintering temperature of 1050°C for a period of time of 72 h. SEM analysis showed that the ceramics are well densified and consisted of well individualized grains of a narrow size distribution. Magnetization measurements revealed the existence of a Yafet-Kittel configuration at low temperature and a ferrimagnetic-paramagnetic transition with increasing temperature. The Curie temperature decreased from 250 K for x = 2.5 to 200 K for x = 4.

Affiliations:

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Le document en format XML

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Mn<sub>8</sub>
O<sub>24</sub>
 (0≤x≤4)</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Preparation and characterization of the spinel series Co<sub>6+x</sub>
Ni<sub>4-x</sub>
Mn<sub>8</sub>
O<sub>24</sub>
 (0≤x≤4)</title>
<author><name sortKey="Boudaya, C" sort="Boudaya, C" uniqKey="Boudaya C" first="C." last="Boudaya">C. Boudaya</name>
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<author><name sortKey="Dhahri, E" sort="Dhahri, E" uniqKey="Dhahri E" first="E." last="Dhahri">E. Dhahri</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des matériaux, Faculté des Sciences de Sfax, BP 763</s1>
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<s3>TUN</s3>
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<author><name sortKey="Cheikh Rouhou, A" sort="Cheikh Rouhou, A" uniqKey="Cheikh Rouhou A" first="A." last="Cheikh-Rouhou">A. Cheikh-Rouhou</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt oxides</term>
<term>Crystal structure</term>
<term>Curie point</term>
<term>Experimental study</term>
<term>Magnetic transitions</term>
<term>Magnetization</term>
<term>Manganese oxides</term>
<term>Microstructure</term>
<term>Nickel oxides</term>
<term>Preparation</term>
<term>Quantity ratio</term>
<term>Quaternary compounds</term>
<term>SEM</term>
<term>Sintering</term>
<term>Spinels</term>
<term>XRD</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>Préparation</term>
<term>Frittage</term>
<term>Microstructure</term>
<term>Structure cristalline</term>
<term>Aimantation</term>
<term>Point Curie</term>
<term>Transition magnétique</term>
<term>Effet concentration</term>
<term>Diffraction RX</term>
<term>SEM</term>
<term>Spinelles</term>
<term>Cobalt oxyde</term>
<term>Nickel oxyde</term>
<term>Manganèse oxyde</term>
<term>Composé quaternaire</term>
<term>Co6+xNi4-xMn8O24</term>
<term>Co Mn Ni O</term>
<term>6166F</term>
<term>7530K</term>
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<front><div type="abstract" xml:lang="en">Samples of the spinel series, Co<sub>6+x</sub>
Ni<sub>4-x</sub>
Mn<sub>8</sub>
O<sub>24</sub>
 (0≤x≤4), prepared by traditional ceramic procedures, are characterized by X-ray diffraction, SEM techniques and magnetization measurements. In the whole concentration range, a single-phase cubic spinels are obtained at a sintering temperature of 1050°C for a period of time of 72 h. SEM analysis showed that the ceramics are well densified and consisted of well individualized grains of a narrow size distribution. Magnetization measurements revealed the existence of a Yafet-Kittel configuration at low temperature and a ferrimagnetic-paramagnetic transition with increasing temperature. The Curie temperature decreased from 250 K for x = 2.5 to 200 K for x = 4.</div>
</front>
</TEI>
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Preparation and characterization of the spinel series Co6+xNi4-xMn8O24 (0≤x≤4)

Preparation and characterization of the spinel series Co6+xNi4-xMn8O24 (0≤x≤4)

Source :

Descripteurs français

English descriptors

Abstract

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