A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites
Identifieur interne : 000116 ( PascalFrancis/Checkpoint ); précédent : 000115; suivant : 000117A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites
Auteurs : A. Ben Amor [Tunisie] ; M. Koubaa [Tunisie] ; W. Cheikhrouhou-Koubaa [Tunisie] ; A. Cheikhrouhou [Tunisie, France]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Moment magnétique, Réaction état solide, Composition chimique, Lacune, Effet thermomagnétique, Processus irréversible, Aimantation, Effet champ magnétique, Ordre longue distance, Point Curie, Verre spin, Cobalt Lanthane Strontium Oxyde Mixte, Etat spin, Réseau rhomboédrique, Matériau ferromagnétique, Cobaltite de lanthane et de strontium.
English descriptors
- KwdEn :
- Chemical composition, Cobalt Lanthanum Strontium Oxides Mixed, Curie point, Ferromagnetic materials, Irreversible processes, Long-range order, Magnetic field effects, Magnetic moments, Magnetization, Solid state reaction, Spin glasses, Spin state, Thermomagnetic effects, Trigonal lattices, Vacancies.
Abstract
Structural and magnetic properties of La0.7Sr0.3-x□xCoO3 (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å3 (x=0) to 338.2 Å3 (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co3+ (intermediate spin configuration) and Co4+ (low spin configuration) for 0 < x ≤ 0.125 and Co3+ (low spin configuration) and Co4+ (low spin configuration) for x = 0.15.
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Koubaa</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation></author><author><name sortKey="Cheikhrouhou Koubaa, W" sort="Cheikhrouhou Koubaa, W" uniqKey="Cheikhrouhou Koubaa W" first="W." last="Cheikhrouhou-Koubaa">W. Cheikhrouhou-Koubaa</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation></author><author><name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. 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Ben Amor</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation></author><author><name sortKey="Koubaa, M" sort="Koubaa, M" uniqKey="Koubaa M" first="M." last="Koubaa">M. Koubaa</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation></author><author><name sortKey="Cheikhrouhou Koubaa, W" sort="Cheikhrouhou Koubaa, W" uniqKey="Cheikhrouhou Koubaa W" first="W." last="Cheikhrouhou-Koubaa">W. Cheikhrouhou-Koubaa</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation></author><author><name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. Cheikhrouhou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Sfax</wicri:noRegion></affiliation><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut NEEL, CNRS, B.P. 166</s1><s2>38042 Grenoble</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Grenoble</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical composition</term><term>Cobalt Lanthanum Strontium Oxides Mixed</term><term>Curie point</term><term>Ferromagnetic materials</term><term>Irreversible processes</term><term>Long-range order</term><term>Magnetic field effects</term><term>Magnetic moments</term><term>Magnetization</term><term>Solid state reaction</term><term>Spin glasses</term><term>Spin state</term><term>Thermomagnetic effects</term><term>Trigonal lattices</term><term>Vacancies</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Moment magnétique</term><term>Réaction état solide</term><term>Composition chimique</term><term>Lacune</term><term>Effet thermomagnétique</term><term>Processus irréversible</term><term>Aimantation</term><term>Effet champ magnétique</term><term>Ordre longue distance</term><term>Point Curie</term><term>Verre spin</term><term>Cobalt Lanthane Strontium Oxyde Mixte</term><term>Etat spin</term><term>Réseau rhomboédrique</term><term>Matériau ferromagnétique</term><term>Cobaltite de lanthane et de strontium</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Structural and magnetic properties of La<sub>0.7</sub>Sr<sub>0.3-x</sub>□<sub>x</sub>CoO<sub>3</sub> (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å<sup>3</sup> (x=0) to 338.2 Å<sup>3</sup> (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co<sup>3+</sup> (intermediate spin configuration) and Co<sup>4+</sup> (low spin configuration) for 0 < x ≤ 0.125 and Co<sup>3+</sup> (low spin configuration) and Co<sup>4+</sup> (low spin configuration) for x = 0.15.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0925-8388</s0></fA01><fA03 i2="1"><s0>J. alloys compd.</s0></fA03><fA05><s2>467</s2></fA05><fA06><s2>1-2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>A-site deficiency effects on the structural and magnetic properties of La<sub>0.7</sub>Sr<sub>0.3-x</sub>□<sub>x</sub>CoO<sub>3</sub> cobaltites</s1></fA08><fA11 i1="01" i2="1"><s1>BEN AMOR (A.)</s1></fA11><fA11 i1="02" i2="1"><s1>KOUBAA (M.)</s1></fA11><fA11 i1="03" i2="1"><s1>CHEIKHROUHOU-KOUBAA (W.)</s1></fA11><fA11 i1="04" i2="1"><s1>CHEIKHROUHOU (A.)</s1></fA11><fA14 i1="01"><s1>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802</s1><s2>Sfax</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA14 i1="02"><s1>Institut NEEL, CNRS, B.P. 166</s1><s2>38042 Grenoble</s2><s3>FRA</s3><sZ>4 aut.</sZ></fA14><fA20><s1>78-82</s1></fA20><fA21><s1>2009</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>1151</s2><s5>354000184061900210</s5></fA43><fA44><s0>0000</s0><s1>© 2009 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>22 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>09-0055184</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Journal of alloys and compounds</s0></fA64><fA66 i1="01"><s0>CHE</s0></fA66><fC01 i1="01" l="ENG"><s0>Structural and magnetic properties of La<sub>0.7</sub>Sr<sub>0.3-x</sub>□<sub>x</sub>CoO<sub>3</sub> (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å<sup>3</sup> (x=0) to 338.2 Å<sup>3</sup> (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co<sup>3+</sup> (intermediate spin configuration) and Co<sup>4+</sup> (low spin configuration) for 0 < x ≤ 0.125 and Co<sup>3+</sup> (low spin configuration) and Co<sup>4+</sup> (low spin configuration) for x = 0.15.</s0></fC01><fC02 i1="01" i2="3"><s0>001B70E60E</s0></fC02><fC02 i1="02" i2="3"><s0>001B70E25</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Moment magnétique</s0><s5>02</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Magnetic moments</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Réaction état solide</s0><s5>03</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Solid state reaction</s0><s5>03</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Reacción estado sólido</s0><s5>03</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Composition chimique</s0><s5>04</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Chemical composition</s0><s5>04</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Lacune</s0><s5>05</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Vacancies</s0><s5>05</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Effet thermomagnétique</s0><s5>06</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Thermomagnetic effects</s0><s5>06</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Processus irréversible</s0><s5>07</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Irreversible processes</s0><s5>07</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Aimantation</s0><s5>08</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Magnetization</s0><s5>08</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Effet champ magnétique</s0><s5>09</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Magnetic field effects</s0><s5>09</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Ordre longue distance</s0><s5>10</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Long-range order</s0><s5>10</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Point Curie</s0><s5>11</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Curie point</s0><s5>11</s5></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Verre spin</s0><s5>12</s5></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Spin glasses</s0><s5>12</s5></fC03><fC03 i1="12" i2="X" l="FRE"><s0>Cobalt Lanthane Strontium Oxyde Mixte</s0><s2>NC</s2><s2>NA</s2><s5>13</s5></fC03><fC03 i1="12" i2="X" l="ENG"><s0>Cobalt Lanthanum Strontium Oxides Mixed</s0><s2>NC</s2><s2>NA</s2><s5>13</s5></fC03><fC03 i1="12" i2="X" l="SPA"><s0>Mixto</s0><s2>NC</s2><s2>NA</s2><s5>13</s5></fC03><fC03 i1="13" i2="X" l="FRE"><s0>Etat spin</s0><s5>14</s5></fC03><fC03 i1="13" i2="X" l="ENG"><s0>Spin state</s0><s5>14</s5></fC03><fC03 i1="13" i2="X" l="SPA"><s0>Estado espín</s0><s5>14</s5></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Réseau rhomboédrique</s0><s5>15</s5></fC03><fC03 i1="14" i2="3" l="ENG"><s0>Trigonal lattices</s0><s5>15</s5></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Matériau ferromagnétique</s0><s5>16</s5></fC03><fC03 i1="15" i2="3" l="ENG"><s0>Ferromagnetic materials</s0><s5>16</s5></fC03><fC03 i1="16" i2="3" l="FRE"><s0>Cobaltite de lanthane et de strontium</s0><s4>INC</s4><s5>63</s5></fC03><fN21><s1>040</s1></fN21></pA></standard></inist><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Grenoble</li></settlement></list><tree><country name="Tunisie"><noRegion><name sortKey="Ben Amor, A" sort="Ben Amor, A" uniqKey="Ben Amor A" first="A." last="Ben Amor">A. Ben Amor</name></noRegion><name sortKey="Cheikhrouhou Koubaa, W" sort="Cheikhrouhou Koubaa, W" uniqKey="Cheikhrouhou Koubaa W" first="W." last="Cheikhrouhou-Koubaa">W. Cheikhrouhou-Koubaa</name><name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. Cheikhrouhou</name><name sortKey="Koubaa, M" sort="Koubaa, M" uniqKey="Koubaa M" first="M." last="Koubaa">M. Koubaa</name></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Cheikhrouhou, A" sort="Cheikhrouhou, A" uniqKey="Cheikhrouhou A" first="A." last="Cheikhrouhou">A. Cheikhrouhou</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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