NickelMaghrebV1, France, Analysis, bibRecord, 000339

Crystal structure and magnetic properties of Sr4Mn2NiO9

Identifieur interne : 000339 ( France/Analysis ); précédent : 000338; suivant : 000340

Crystal structure and magnetic properties of Sr4Mn2NiO9

Auteurs : AHMED EL ABED [France, Maroc] ; Etienne Gaudin [France] ; Sylvain Lemaux [France] ; Jacques Darriet [France]

Source :

Solid state sciences [ 1293-2558 ] ; 2001.

RBID : Pascal:02-0094825

Descripteurs français

Pascal (Inist)
- Etude expérimentale, Diffraction RX, Structure cristalline, Strontium oxyde, Manganèse oxyde, Nickel oxyde, Perovskites, Réseau hexagonal, Distribution ion, Occupation site, XANES, Valence, Matériau antiferromagnétique, Susceptibilité magnétique, Point Curie, 6166F, 7550E, Sr4Mn2NiO9, Mn Ni O Sr.
Wicri :
- geographic : Valence (Drôme).

English descriptors

KwdEn :
- Antiferromagnetic materials, Crystal structure, Curie point, Experimental study, Hexagonal lattices, Ion distribution, Magnetic susceptibility, Manganese oxides, Nickel oxides, Perovskites, Site occupation, Strontium oxides, Valence, XANES, XRD.

Abstract

The crystal structure of Sr₄Mn₂NiO₉ has been refined on single crystal. This phase belongs to the series A_1+x(A'_xB_1-x)O₃ (x = 1/3) related to the 2H-hexagonal perovskite. The structure contains transition metals in chains of oxide polyhedra (trigonal prisms and octahedra); neighboring chains are separated from each other by the Sr atoms. The sequence of the face sharing polyhedra along the chains is two octahedra + one trigonal prism. Mn occupies the octahedra and Ni is disordered in the trigonal prism with 80% in the pseudo square faces of the prism and 20% at the centre. This result has been confirmed by XANES experiments at Mn K and Ni K edges, respectively. Sr₄Mn₂NiO₉ is antiferromagnetic with a Néel temperature at T = 3 K. The Curie constant measured at high temperature is in good agreement with 80% of the Ni²⁺ ions in the spin state configuration S = 0.

Affiliations:

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Le document en format XML

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Mn<sub>2</sub>
NiO<sub>9</sub>
</title>
<author><name sortKey="Ahmed El Abed" sort="Ahmed El Abed" uniqKey="Ahmed El Abed" last="Ahmed El Abed">AHMED EL ABED</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Crystal structure and magnetic properties of Sr<sub>4</sub>
Mn<sub>2</sub>
NiO<sub>9</sub>
</title>
<author><name sortKey="Ahmed El Abed" sort="Ahmed El Abed" uniqKey="Ahmed El Abed" last="Ahmed El Abed">AHMED EL ABED</name>
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<author><name sortKey="Lemaux, Sylvain" sort="Lemaux, Sylvain" uniqKey="Lemaux S" first="Sylvain" last="Lemaux">Sylvain Lemaux</name>
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<series><title level="j" type="main">Solid state sciences</title>
<title level="j" type="abbreviated">Solid state sci.</title>
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<imprint><date when="2001">2001</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Antiferromagnetic materials</term>
<term>Crystal structure</term>
<term>Curie point</term>
<term>Experimental study</term>
<term>Hexagonal lattices</term>
<term>Ion distribution</term>
<term>Magnetic susceptibility</term>
<term>Manganese oxides</term>
<term>Nickel oxides</term>
<term>Perovskites</term>
<term>Site occupation</term>
<term>Strontium oxides</term>
<term>Valence</term>
<term>XANES</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>Diffraction RX</term>
<term>Structure cristalline</term>
<term>Strontium oxyde</term>
<term>Manganèse oxyde</term>
<term>Nickel oxyde</term>
<term>Perovskites</term>
<term>Réseau hexagonal</term>
<term>Distribution ion</term>
<term>Occupation site</term>
<term>XANES</term>
<term>Valence</term>
<term>Matériau antiferromagnétique</term>
<term>Susceptibilité magnétique</term>
<term>Point Curie</term>
<term>6166F</term>
<term>7550E</term>
<term>Sr4Mn2NiO9</term>
<term>Mn Ni O Sr</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Valence (Drôme)</term>
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<front><div type="abstract" xml:lang="en">The crystal structure of Sr<sub>4</sub>
Mn<sub>2</sub>
NiO<sub>9</sub>
 has been refined on single crystal. This phase belongs to the series A<sub>1+x</sub>
(A'<sub>x</sub>
B<sub>1-x</sub>
)O<sub>3</sub>
 (x = 1/3) related to the 2H-hexagonal perovskite. The structure contains transition metals in chains of oxide polyhedra (trigonal prisms and octahedra); neighboring chains are separated from each other by the Sr atoms. The sequence of the face sharing polyhedra along the chains is two octahedra + one trigonal prism. Mn occupies the octahedra and Ni is disordered in the trigonal prism with  80% in the pseudo square faces of the prism and  20% at the centre. This result has been confirmed by XANES experiments at Mn K and Ni K edges, respectively. Sr<sub>4</sub>
Mn<sub>2</sub>
NiO<sub>9</sub>
 is antiferromagnetic with a Néel temperature at T = 3 K. The Curie constant measured at high temperature is in good agreement with  80% of the Ni<sup>2+</sup>
 ions in the spin state configuration S = 0.</div>
</front>
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Crystal structure and magnetic properties of Sr4Mn2NiO9

Crystal structure and magnetic properties of Sr4Mn2NiO9

Source :

Descripteurs français

English descriptors

Abstract

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

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri