Crystal structure and magnetic properties of Sr4Mn2NiO9
Identifieur interne : 001726 ( Istex/Corpus ); précédent : 001725; suivant : 001727Crystal structure and magnetic properties of Sr4Mn2NiO9
Auteurs : Ahmed El Abed ; Etienne Gaudin ; Sylvain Lemaux ; Jacques DarrietSource :
- Solid State Sciences [ 1293-2558 ] ; 2001.
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Abstract
The crystal structure of Sr4Mn2NiO9 has been refined on single crystal. This phase belongs to the series A1+x(A′xB1–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.
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DOI: 10.1016/S1293-2558(01)01213-4
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Crystal structure and magnetic properties of Sr4Mn2NiO9</title><author><name sortKey="El Abed, Ahmed" sort="El Abed, Ahmed" uniqKey="El Abed A" first="Ahmed" last="El Abed">Ahmed El Abed</name><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Gaudin, Etienne" sort="Gaudin, Etienne" uniqKey="Gaudin E" first="Etienne" last="Gaudin">Etienne Gaudin</name><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Lemaux, Sylvain" sort="Lemaux, Sylvain" uniqKey="Lemaux S" first="Sylvain" last="Lemaux">Sylvain Lemaux</name><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Darriet, Jacques" sort="Darriet, Jacques" uniqKey="Darriet J" first="Jacques" last="Darriet">Jacques Darriet</name><affiliation><mods:affiliation>E-mail: darriet@icmcb.u-bordeaux.fr</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. 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Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Gaudin, Etienne" sort="Gaudin, Etienne" uniqKey="Gaudin E" first="Etienne" last="Gaudin">Etienne Gaudin</name><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Lemaux, Sylvain" sort="Lemaux, Sylvain" uniqKey="Lemaux S" first="Sylvain" last="Lemaux">Sylvain Lemaux</name><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Darriet, Jacques" sort="Darriet, Jacques" uniqKey="Darriet J" first="Jacques" last="Darriet">Jacques Darriet</name><affiliation><mods:affiliation>E-mail: darriet@icmcb.u-bordeaux.fr</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Solid State Sciences</title><title level="j" type="abbrev">SSSCIE</title><idno type="ISSN">1293-2558</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001">2001</date><biblScope unit="volume">3</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="887">887</biblScope><biblScope unit="page" to="897">897</biblScope></imprint><idno type="ISSN">1293-2558</idno></series><idno type="istex">6D4758B098D1D260961CBE5B84CBC425C1EB37B8</idno><idno type="DOI">10.1016/S1293-2558(01)01213-4</idno><idno type="PII">S1293-2558(01)01213-4</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1293-2558</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crystal structure</term><term>Magnetic properties</term><term>Perovskite</term><term>Synthesis</term><term>XANES</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The crystal structure of Sr4Mn2NiO9 has been refined on single crystal. This phase belongs to the series A1+x(A′xB1–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.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Ahmed El Abed</name><affiliations><json:string>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</json:string></affiliations></json:item><json:item><name>Etienne Gaudin</name><affiliations><json:string>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</json:string></affiliations></json:item><json:item><name>Sylvain Lemaux</name><affiliations><json:string>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</json:string></affiliations></json:item><json:item><name>Jacques Darriet</name><affiliations><json:string>E-mail: darriet@icmcb.u-bordeaux.fr</json:string><json:string>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Perovskite</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Synthesis</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Crystal structure</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>XANES</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Magnetic properties</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The crystal structure of Sr4Mn2NiO9 has been refined on single crystal. This phase belongs to the series A1+x(A′xB1–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.</abstract><qualityIndicators><score>6.668</score><pdfVersion>1.2</pdfVersion><pdfPageSize>575 x 741 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>5</keywordCount><abstractCharCount>866</abstractCharCount><pdfWordCount>5100</pdfWordCount><pdfCharCount>27915</pdfCharCount><pdfPageCount>11</pdfPageCount><abstractWordCount>139</abstractWordCount></qualityIndicators><title>Crystal structure and magnetic properties of Sr4Mn2NiO9</title><pii><json:string>S1293-2558(01)01213-4</json:string></pii><genre><json:string>research-article</json:string></genre><host><volume>3</volume><pii><json:string>S1293-2558(00)X0015-5</json:string></pii><pages><last>897</last><first>887</first></pages><issn><json:string>1293-2558</json:string></issn><issue>8</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Solid State Sciences</title><publicationDate>2001</publicationDate></host><categories><wos><json:string>PHYSICS, CONDENSED MATTER</json:string><json:string>CHEMISTRY, INORGANIC & NUCLEAR</json:string><json:string>CHEMISTRY, PHYSICAL</json:string></wos></categories><publicationDate>2001</publicationDate><copyrightDate>2001</copyrightDate><doi><json:string>10.1016/S1293-2558(01)01213-4</json:string></doi><id>6D4758B098D1D260961CBE5B84CBC425C1EB37B8</id><score>0.034466427</score><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/6D4758B098D1D260961CBE5B84CBC425C1EB37B8/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/6D4758B098D1D260961CBE5B84CBC425C1EB37B8/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/6D4758B098D1D260961CBE5B84CBC425C1EB37B8/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Crystal structure and magnetic properties of Sr4Mn2NiO9</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2001 Éditions scientifiques et médicales Elsevier SAS</p></availability><date>2001</date></publicationStmt><notesStmt><note type="content">Figure 1: xy section of the difference Fourier maps (Å) around: (a) Ni1p with z=0 and (b) Ni2p with z=0.232. Contours lines in intervals of 2 eÅ−3.</note><note type="content">Figure 2: Representation of the structure of Sr4Mn2NiO9.</note><note type="content">Figure 3: XANES spectra at Mn K-edge of Sr4Mn2NiO9 (a), Sr7Mn4O15 (b), MnO (c), Mn2O3 (d) and MnO2 (e).</note><note type="content">Figure 4: XANES spectra at Ni K-edge of Sr4Mn2NiO9 (1) and NiO (2).</note><note type="content">Figure 5: Profile analysis of the XRD pattern of Sr4Mn2NiO9.</note><note type="content">Figure 6: Profile analysis of the XRD pattern of Sr4Mn2NiO9 around 2θ=45° for γ=2/3 (a) and γ=0.662 (b).</note><note type="content">Figure 7: Profile analysis of the XRD pattern of Sr1+x(NixMn1–x)O3 (x=0.324) calculated for γ=0.662 (a) and γ=2/3.</note><note type="content">Figure 8: Thermal variation of the magnetic susceptibility of Sr4Mn2- NiO9.</note><note type="content">Figure 9: Representation of the two types of chains in Sr4Mn2NiO9.</note><note type="content">Table 1: Crystallographic data for Sr4Mn2NiO9</note><note type="content">Table 2: Fractional atomic coordinates, equivalent isotropic displacement parametersa (Å2) and occupancy for Sr4Mn2NiO9</note><note type="content">Table 3: Anisotropic displacement parameters Uija (Å2) and s.u. for Sr4Mn2NiO9</note><note type="content">Table 4: Main interatomic distances (Å) and s.u. in Sr4Mn2NiO9</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Crystal structure and magnetic properties of Sr4Mn2NiO9</title><author xml:id="author-1"><persName><forename type="first">Ahmed</forename><surname>El Abed</surname></persName><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation></author><author xml:id="author-2"><persName><forename type="first">Etienne</forename><surname>Gaudin</surname></persName><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation></author><author xml:id="author-3"><persName><forename type="first">Sylvain</forename><surname>Lemaux</surname></persName><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation></author><author xml:id="author-4"><persName><forename type="first">Jacques</forename><surname>Darriet</surname></persName><email>darriet@icmcb.u-bordeaux.fr</email><note type="correspondence"><p>Correspondence and reprints.</p></note><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation></author></analytic><monogr><title level="j">Solid State Sciences</title><title level="j" type="abbrev">SSSCIE</title><idno type="pISSN">1293-2558</idno><idno type="PII">S1293-2558(00)X0015-5</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001"></date><biblScope unit="volume">3</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="887">887</biblScope><biblScope unit="page" to="897">897</biblScope></imprint></monogr><idno type="istex">6D4758B098D1D260961CBE5B84CBC425C1EB37B8</idno><idno type="DOI">10.1016/S1293-2558(01)01213-4</idno><idno type="PII">S1293-2558(01)01213-4</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2001</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The crystal structure of Sr4Mn2NiO9 has been refined on single crystal. This phase belongs to the series A1+x(A′xB1–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.</p></abstract><abstract style="graphical"><p>Graphicfgr001</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Perovskite</term></item><item><term>Synthesis</term></item><item><term>Crystal structure</term></item><item><term>XANES</term></item><item><term>Magnetic properties</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2001-08-29">Modified</change><change when="2001">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/6D4758B098D1D260961CBE5B84CBC425C1EB37B8/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr001" NDATA="IMAGE" name="fgr001"></istex:entity><istex:entity SYSTEM="gr002" NDATA="IMAGE" name="fgr002"></istex:entity><istex:entity SYSTEM="gr003" NDATA="IMAGE" name="fgr003"></istex:entity><istex:entity SYSTEM="gr004" NDATA="IMAGE" name="fgr004"></istex:entity><istex:entity SYSTEM="gr005" NDATA="IMAGE" name="fgr005"></istex:entity><istex:entity SYSTEM="gr006" NDATA="IMAGE" name="fgr006"></istex:entity><istex:entity SYSTEM="gr007" NDATA="IMAGE" name="fgr007"></istex:entity><istex:entity SYSTEM="gr008" NDATA="IMAGE" name="fgr008"></istex:entity><istex:entity SYSTEM="gr009" NDATA="IMAGE" name="fgr009"></istex:entity><istex:entity SYSTEM="gr010" NDATA="IMAGE" name="fgr010"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>PXSS</jid><aid>1213</aid><ce:pii>S1293-2558(01)01213-4</ce:pii><ce:doi>10.1016/S1293-2558(01)01213-4</ce:doi><ce:copyright type="full-transfer" year="2001">Éditions scientifiques et médicales Elsevier SAS</ce:copyright></item-info><head><ce:title>Crystal structure and magnetic properties of Sr<ce:inf>4</ce:inf>Mn<ce:inf>2</ce:inf>NiO<ce:inf>9</ce:inf></ce:title><ce:author-group><ce:author><ce:given-name>Ahmed</ce:given-name><ce:surname>El Abed</ce:surname><ce:cross-ref refid="AFF001"><ce:sup>a</ce:sup></ce:cross-ref><ce:cross-ref refid="AFF002"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>Etienne</ce:given-name><ce:surname>Gaudin</ce:surname><ce:cross-ref refid="AFF001"><ce:sup>a</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>Sylvain</ce:given-name><ce:surname>Lemaux</ce:surname><ce:cross-ref refid="AFF001"><ce:sup>a</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>Jacques</ce:given-name><ce:surname>Darriet</ce:surname><ce:cross-ref refid="AFF001"><ce:sup>a</ce:sup></ce:cross-ref><ce:cross-ref refid="COR001"><ce:sup>∗</ce:sup></ce:cross-ref><ce:e-address>darriet@icmcb.u-bordeaux.fr</ce:e-address></ce:author><ce:affiliation id="AFF001"><ce:label>a</ce:label><ce:textfn>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF002"><ce:label>b</ce:label><ce:textfn>Laboratoire de Physique du Solide, Faculté de Sciences, Université Mohamed 1er, Oujda, Morocco</ce:textfn></ce:affiliation><ce:correspondence id="COR001"><ce:label>∗</ce:label><ce:text>Correspondence and reprints.</ce:text></ce:correspondence></ce:author-group><ce:date-received day="19" month="6" year="2001"></ce:date-received><ce:date-revised day="29" month="8" year="2001"></ce:date-revised><ce:date-accepted day="18" month="9" year="2001"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>The crystal structure of Sr<ce:inf>4</ce:inf>Mn<ce:inf>2</ce:inf>NiO<ce:inf>9</ce:inf> has been refined on single crystal. This phase belongs to the series A<ce:inf>1+<ce:italic>x</ce:italic></ce:inf>(A<ce:sup>′</ce:sup><ce:inf><ce:italic>x</ce:italic></ce:inf>B<ce:inf>1–<ce:italic>x</ce:italic></ce:inf>)O<ce:inf>3</ce:inf> (<ce:italic>x</ce:italic>=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<math altimg="si6.gif"><ce:hsp sp="0.2"></ce:hsp>+<ce:hsp sp="0.2"></ce:hsp></math>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<ce:inf>4</ce:inf>Mn<ce:inf>2</ce:inf>NiO<ce:inf>9</ce:inf> is antiferromagnetic with a Néel temperature at <ce:italic>T</ce:italic>=3 K. The Curie constant measured at high temperature is in good agreement with ≈80% of the Ni<ce:sup>2+</ce:sup> ions in the spin state configuration <ce:italic>S</ce:italic>=0.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract class="graphical"><ce:abstract-sec><ce:simple-para>Graphic</ce:simple-para></ce:abstract-sec><ce:figure><ce:link locator="fgr001"></ce:link></ce:figure></ce:abstract><ce:keywords><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Perovskite</ce:text></ce:keyword><ce:keyword><ce:text>Synthesis</ce:text></ce:keyword><ce:keyword><ce:text>Crystal structure</ce:text></ce:keyword><ce:keyword><ce:text>XANES</ce:text></ce:keyword><ce:keyword><ce:text>Magnetic properties</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Crystal structure and magnetic properties of Sr4Mn2NiO9</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Crystal structure and magnetic properties of Sr</title></titleInfo><name type="personal"><namePart type="given">Ahmed</namePart><namePart type="family">El Abed</namePart><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Etienne</namePart><namePart type="family">Gaudin</namePart><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Sylvain</namePart><namePart type="family">Lemaux</namePart><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jacques</namePart><namePart type="family">Darriet</namePart><affiliation>E-mail: darriet@icmcb.u-bordeaux.fr</affiliation><affiliation>Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB, UPR 9048 CNRS), 87 Avenue du Docteur A. Schweitzer, 33608 Pessac cedex, France</affiliation><description>Correspondence and reprints.</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2001</dateIssued><dateModified encoding="w3cdtf">2001-08-29</dateModified><copyrightDate encoding="w3cdtf">2001</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The crystal structure of Sr4Mn2NiO9 has been refined on single crystal. This phase belongs to the series A1+x(A′xB1–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.</abstract><abstract type="graphical">Graphicfgr001 </abstract><note type="content">Figure 1: xy section of the difference Fourier maps (Å) around: (a) Ni1p with z=0 and (b) Ni2p with z=0.232. Contours lines in intervals of 2 eÅ−3.</note><note type="content">Figure 2: Representation of the structure of Sr4Mn2NiO9.</note><note type="content">Figure 3: XANES spectra at Mn K-edge of Sr4Mn2NiO9 (a), Sr7Mn4O15 (b), MnO (c), Mn2O3 (d) and MnO2 (e).</note><note type="content">Figure 4: XANES spectra at Ni K-edge of Sr4Mn2NiO9 (1) and NiO (2).</note><note type="content">Figure 5: Profile analysis of the XRD pattern of Sr4Mn2NiO9.</note><note type="content">Figure 6: Profile analysis of the XRD pattern of Sr4Mn2NiO9 around 2θ=45° for γ=2/3 (a) and γ=0.662 (b).</note><note type="content">Figure 7: Profile analysis of the XRD pattern of Sr1+x(NixMn1–x)O3 (x=0.324) calculated for γ=0.662 (a) and γ=2/3.</note><note type="content">Figure 8: Thermal variation of the magnetic susceptibility of Sr4Mn2- NiO9.</note><note type="content">Figure 9: Representation of the two types of chains in Sr4Mn2NiO9.</note><note type="content">Table 1: Crystallographic data for Sr4Mn2NiO9</note><note type="content">Table 2: Fractional atomic coordinates, equivalent isotropic displacement parametersa (Å2) and occupancy for Sr4Mn2NiO9</note><note type="content">Table 3: Anisotropic displacement parameters Uija (Å2) and s.u. for Sr4Mn2NiO9</note><note type="content">Table 4: Main interatomic distances (Å) and s.u. in Sr4Mn2NiO9</note><subject lang="en"><genre>Keywords</genre><topic>Perovskite</topic><topic>Synthesis</topic><topic>Crystal structure</topic><topic>XANES</topic><topic>Magnetic properties</topic></subject><relatedItem type="host"><titleInfo><title>Solid State Sciences</title></titleInfo><titleInfo type="abbreviated"><title>SSSCIE</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">200112</dateIssued></originInfo><identifier type="ISSN">1293-2558</identifier><identifier type="PII">S1293-2558(00)X0015-5</identifier><part><date>200112</date><detail type="volume"><number>3</number><caption>vol.</caption></detail><detail type="issue"><number>8</number><caption>no.</caption></detail><extent unit="issue pages"><start>827</start><end>908</end></extent><extent unit="pages"><start>887</start><end>897</end></extent></part></relatedItem><identifier type="istex">6D4758B098D1D260961CBE5B84CBC425C1EB37B8</identifier><identifier type="DOI">10.1016/S1293-2558(01)01213-4</identifier><identifier type="PII">S1293-2558(01)01213-4</identifier><accessCondition type="use and reproduction" contentType="copyright">©2001 Éditions scientifiques et médicales Elsevier SAS</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Éditions scientifiques et médicales Elsevier SAS, ©2001</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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