Magnetic properties of LiNi0.5Mn1.5O4 spinels prepared by wet chemical methods
Identifieur interne : 000652 ( Main/Exploration ); précédent : 000651; suivant : 000653Magnetic properties of LiNi0.5Mn1.5O4 spinels prepared by wet chemical methods
Auteurs : N. Amdouni [France, Tunisie] ; K. Zaghib [Canada] ; F. Gendron [France] ; A. Mauger [France] ; C. M. Julien [France]Source :
- Journal of magnetism and magnetic materials [ 0304-8853 ] ; 2007.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We present the magnetic properties of LiNi0.5Mn1.5O4 spinels prepared by the sol-gel and pyrolysis techniques. Structural properties show that the material synthesized by pyrolysis method exhibit an ordered spinel structure. Characterization methods include SQUID magnetometry and ESR spectroscopy. Magnetic measurements have evidenced the ferromagnetic ordering below Tc = 129K in LiNi0.5Mn1.5O4. Results show that actually no impurity phase is detected in LiNi0.5Mn1.5O4, thus the ferrimagnetic behavior is attributed to an intrinsic property of this material. The magnetic order in this case is trivially a collinear ferrimagnetic ordering in which both the Ni sublattice and the Mn sublattice are ferromagnetic. ESR measurements show a two-component signal with a complex shape. The dominant band is assigned to Mn4+ ions that are the only paramagnetic entities in this compound.
Affiliations:
- Canada, France, Tunisie
- Gouvernorat de Tunis, Île-de-France
- Paris, Tunis
- Université Pierre-et-Marie-Curie, Université de Tunis - El Manar
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Amdouni</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institut des Nano-Sciences de Paris, CNRS-UMR7588, Campus Boucicaut, Université Pierre et Marie Curie, 140 rue de Lourmel</s1><s2>75015 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Laboratoire de Chimie des Matériaux, Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire</s1><s2>2092 El Manar</s2><s3>TUN</s3><sZ>1 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>2092 El Manar</wicri:noRegion><orgName type="university">Université de Tunis - El Manar</orgName><placeName><settlement type="city">Tunis</settlement><region type="region" nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Zaghib, K" sort="Zaghib, K" uniqKey="Zaghib K" first="K." last="Zaghib">K. Zaghib</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Institut de Recherches d'Hydro-Québec, 1800 Boul. Lionel-Boulet</s1><s2>Varennes, Québec, J3X 1S1</s2><s3>CAN</s3><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Varennes, Québec, J3X 1S1</wicri:noRegion></affiliation></author><author><name sortKey="Gendron, F" sort="Gendron, F" uniqKey="Gendron F" first="F." last="Gendron">F. Gendron</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institut des Nano-Sciences de Paris, CNRS-UMR7588, Campus Boucicaut, Université Pierre et Marie Curie, 140 rue de Lourmel</s1><s2>75015 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Mauger, A" sort="Mauger, A" uniqKey="Mauger A" first="A." last="Mauger">A. Mauger</name><affiliation wicri:level="3"><inist:fA14 i1="04"><s1>Département MIPPU, CNRS, Campus Boucicaut, 140 rue de Lourmel</s1><s2>75015 Paris</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Julien, C M" sort="Julien, C M" uniqKey="Julien C" first="C. M." last="Julien">C. M. Julien</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institut des Nano-Sciences de Paris, CNRS-UMR7588, Campus Boucicaut, Université Pierre et Marie Curie, 140 rue de Lourmel</s1><s2>75015 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author></analytic><series><title level="j" type="main">Journal of magnetism and magnetic materials</title><title level="j" type="abbreviated">J. magn. magn. mater.</title><idno type="ISSN">0304-8853</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of magnetism and magnetic materials</title><title level="j" type="abbreviated">J. magn. magn. mater.</title><idno type="ISSN">0304-8853</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Electron paramagnetic resonance</term><term>Ferrimagnetism</term><term>Ferromagnetic materials</term><term>Ferromagnetism</term><term>Impurities</term><term>Lithium oxides</term><term>Magnetic ordering</term><term>Magnetic properties</term><term>Magnetization</term><term>Manganese oxides</term><term>Nickel oxides</term><term>Paramagnetic materials</term><term>Sol-gel process</term><term>Spinels</term><term>Sublattices</term><term>Synthesis</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Propriété magnétique</term><term>Procédé sol gel</term><term>Aimantation</term><term>Résonance paramagnétique éléctronique</term><term>Ferromagnétisme</term><term>Impureté</term><term>Ferrimagnétisme</term><term>Ordre magnétique</term><term>Sous réseau</term><term>Synthèse</term><term>Spinelles</term><term>Lithium oxyde</term><term>Matériau ferromagnétique</term><term>Matériau paramagnétique</term><term>Nickel oxyde</term><term>Manganèse oxyde</term><term>7630</term><term>7525</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present the magnetic properties of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> spinels prepared by the sol-gel and pyrolysis techniques. Structural properties show that the material synthesized by pyrolysis method exhibit an ordered spinel structure. Characterization methods include SQUID magnetometry and ESR spectroscopy. Magnetic measurements have evidenced the ferromagnetic ordering below T<sub>c</sub> = 129K in LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>. Results show that actually no impurity phase is detected in LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>, thus the ferrimagnetic behavior is attributed to an intrinsic property of this material. The magnetic order in this case is trivially a collinear ferrimagnetic ordering in which both the Ni sublattice and the Mn sublattice are ferromagnetic. ESR measurements show a two-component signal with a complex shape. The dominant band is assigned to Mn<sup>4+</sup> ions that are the only paramagnetic entities in this compound.</div></front></TEI><affiliations><list><country><li>Canada</li><li>France</li><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li><li>Île-de-France</li></region><settlement><li>Paris</li><li>Tunis</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li><li>Université de Tunis - El Manar</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Amdouni, N" sort="Amdouni, N" uniqKey="Amdouni N" first="N." last="Amdouni">N. Amdouni</name></region><name sortKey="Gendron, F" sort="Gendron, F" uniqKey="Gendron F" first="F." last="Gendron">F. Gendron</name><name sortKey="Julien, C M" sort="Julien, C M" uniqKey="Julien C" first="C. M." last="Julien">C. M. Julien</name><name sortKey="Mauger, A" sort="Mauger, A" uniqKey="Mauger A" first="A." last="Mauger">A. Mauger</name></country><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Amdouni, N" sort="Amdouni, N" uniqKey="Amdouni N" first="N." last="Amdouni">N. Amdouni</name></region></country><country name="Canada"><noRegion><name sortKey="Zaghib, K" sort="Zaghib, K" uniqKey="Zaghib K" first="K." last="Zaghib">K. Zaghib</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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