Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol
Identifieur interne : 000548 ( Main/Exploration ); précédent : 000547; suivant : 000549Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol
Auteurs : Mathieu Artus [France] ; Lotfi Ben Tahar [Tunisie] ; Frédéric Herbst [France] ; Leila Smiri [Tunisie] ; Françoise Villain [France] ; Nader Yaacoub [France] ; Jean-Marc Greneche [France] ; Souad Ammar [France] ; Fernand Fievet [France]Source :
- Journal of physics. Condensed matter : (Print) [ 0953-8984 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Effet dimensionnel, Aimantation, Synthèse chimique, Diffraction RX, Microscopie électronique transmission, Spectre absorption RX, Effet Mössbauer, Microstructure, Superparamagnétisme, Synthèse nanomatériau, Effet température, Aimantation saturation, Force coercitive, Cobalt Fer Oxyde Mixte, Nanoparticule, CoFe2O4, Ferrite de cobalt.
English descriptors
- KwdEn :
Abstract
Highly crystalline CoFe2O4 nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and 57Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g-1) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.
Affiliations:
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i1="03"><s1>Synchrotron SOLEIL</s1><s2>91192 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Gif-sur-Yvette</settlement></placeName></affiliation></author><author><name sortKey="Yaacoub, Nader" sort="Yaacoub, Nader" uniqKey="Yaacoub N" first="Nader" last="Yaacoub">Nader Yaacoub</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>LPEC, Université du Maine, CNRS UMR-6087</s1><s2>72085 Le Mans</s2><s3>FRA</s3><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Pays de la Loire</region><settlement type="city">Le Mans</settlement></placeName><orgName type="university">Université du Maine</orgName></affiliation></author><author><name sortKey="Greneche, Jean Marc" sort="Greneche, Jean Marc" uniqKey="Greneche J" first="Jean-Marc" last="Greneche">Jean-Marc Greneche</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>LPEC, Université du Maine, CNRS UMR-6087</s1><s2>72085 Le Mans</s2><s3>FRA</s3><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Pays de la Loire</region><settlement type="city">Le Mans</settlement></placeName><orgName type="university">Université du Maine</orgName></affiliation></author><author><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>ITODYS, Université Paris Diderot, CNRS UMR-7086</s1><s2>75205, Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Île-de-France</region><region type="old region">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Fievet, Fernand" sort="Fievet, Fernand" uniqKey="Fievet F" first="Fernand" last="Fievet">Fernand Fievet</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>ITODYS, Université Paris Diderot, CNRS UMR-7086</s1><s2>75205, Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Île-de-France</region><region type="old region">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of physics. Condensed matter : (Print)</title><title level="j" type="abbreviated">J. phys., Condens. matter : (Print)</title><idno type="ISSN">0953-8984</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of physics. Condensed matter : (Print)</title><title level="j" type="abbreviated">J. phys., Condens. matter : (Print)</title><idno type="ISSN">0953-8984</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical synthesis</term><term>Cobalt Iron Oxides Mixed</term><term>Coercive force</term><term>Magnetization</term><term>Microstructure</term><term>Moessbauer effect</term><term>Nanomaterial synthesis</term><term>Nanoparticles</term><term>Saturation magnetization</term><term>Size effect</term><term>Superparamagnetism</term><term>Temperature effects</term><term>Transmission electron microscopy</term><term>X-ray absorption spectra</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Effet dimensionnel</term><term>Aimantation</term><term>Synthèse chimique</term><term>Diffraction RX</term><term>Microscopie électronique transmission</term><term>Spectre absorption RX</term><term>Effet Mössbauer</term><term>Microstructure</term><term>Superparamagnétisme</term><term>Synthèse nanomatériau</term><term>Effet température</term><term>Aimantation saturation</term><term>Force coercitive</term><term>Cobalt Fer Oxyde Mixte</term><term>Nanoparticule</term><term>CoFe2O4</term><term>Ferrite de cobalt</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Highly crystalline CoFe<sub>2</sub>O<sub>4</sub> nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and <sup>57</sup>Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g<sup>-1</sup>) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Pays de la Loire</li><li>Île-de-France</li></region><settlement><li>Gif-sur-Yvette</li><li>Le Mans</li><li>Paris</li></settlement><orgName><li>Université du Maine</li></orgName></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Artus, Mathieu" sort="Artus, Mathieu" uniqKey="Artus M" first="Mathieu" last="Artus">Mathieu Artus</name></region><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name><name sortKey="Fievet, Fernand" sort="Fievet, Fernand" uniqKey="Fievet F" first="Fernand" last="Fievet">Fernand Fievet</name><name sortKey="Greneche, Jean Marc" sort="Greneche, Jean Marc" uniqKey="Greneche J" first="Jean-Marc" last="Greneche">Jean-Marc Greneche</name><name sortKey="Herbst, Frederic" sort="Herbst, Frederic" uniqKey="Herbst F" first="Frédéric" last="Herbst">Frédéric Herbst</name><name sortKey="Villain, Francoise" sort="Villain, Francoise" uniqKey="Villain F" first="Françoise" last="Villain">Françoise Villain</name><name sortKey="Yaacoub, Nader" sort="Yaacoub, Nader" uniqKey="Yaacoub N" first="Nader" last="Yaacoub">Nader Yaacoub</name></country><country name="Tunisie"><noRegion><name sortKey="Ben Tahar, Lotfi" sort="Ben Tahar, Lotfi" uniqKey="Ben Tahar L" first="Lotfi" last="Ben Tahar">Lotfi Ben Tahar</name></noRegion><name sortKey="Smiri, Leila" sort="Smiri, Leila" uniqKey="Smiri L" first="Leila" last="Smiri">Leila Smiri</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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