Magnetic properties of nanostructured ball-milled Fe and Fe50Co50 alloy
Identifieur interne : 000875 ( Main/Exploration ); précédent : 000874; suivant : 000876Magnetic properties of nanostructured ball-milled Fe and Fe50Co50 alloy
Auteurs : S. Azzaza [Algérie] ; S. Alleg [Algérie] ; H. Moumeni [Algérie] ; A. R. Nemamcha [Algérie] ; J. L. Rehspringer [France] ; J. M. Greneche [France]Source :
- Journal of physics. Condensed matter : (Print) [ 0953-8984 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Aimantation, Broyeur boulet, Diffraction RX, Calorimétrie différentielle balayage, Aimantation saturation, Microstructure, Grosseur grain, Transformation phase, Métallurgie poudre, Transformation ordre désordre, Traitement thermique, Paramètre cristallin, Point Curie, Nanoparticule, Fer alliage, Cobalt alliage, Fer, Nanocristal, Métal transition alliage, Métal transition, 7575.
- Wicri :
- topic : Fer.
English descriptors
- KwdEn :
- Ball mill, Cobalt alloys, Curie point, Differential scanning calorimetry, Grain size, Heat treatments, Iron, Iron alloys, Lattice parameters, Magnetization, Microstructure, Nanocrystal, Nanoparticles, Order-disorder transformations, Phase transformations, Powder metallurgy, Saturation magnetization, Transition element alloys, Transition elements, XRD.
Abstract
Nanostructured Fe and Fe50Co50 powders were prepared by high-energy ball milling. Microstructural and magnetic properties changes with milling time were followed by x-ray diffraction, differential scanning calorimetry and vibrating sample magnetometry. The nonequilibrium microstructure originates from a grain size reduction to about 12 nm and the introduction of internal strain up to 1.5% (root-mean-square strain). The occurrence of disorder in the ball-milled powders is evidenced by the broad exothermic reaction during the heating of ball-milled samples, the variation of lattice parameters and the increase of the saturation magnetization during the first 3 h of milling for Fe and continuously for the Fe50Co50 powder mixture. According to both the reduction of Fe Curie temperature, Tc, and the increase of the phase transformation Tα→γ, the paramagnetic temperature domain of nanostructured bcc α-Fe is extended by about 50 °C. The Fe50Co50 nanostructured powder behaves as a soft ferromagnet with low values of both the coercive field and the squareness ratio Mr/Ms.
Affiliations:
- Algérie, France
- Alsace (région administrative), Grand Est, Pays de la Loire
- Le Mans, Strasbourg
- Université du Maine
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Le document en format XML
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Azzaza</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, BP 12</s1><s2>(23000) Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>(23000) Annaba</wicri:noRegion></affiliation></author><author><name sortKey="Alleg, S" sort="Alleg, S" uniqKey="Alleg S" first="S." last="Alleg">S. Alleg</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, BP 12</s1><s2>(23000) Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>(23000) Annaba</wicri:noRegion></affiliation></author><author><name sortKey="Moumeni, H" sort="Moumeni, H" uniqKey="Moumeni H" first="H." last="Moumeni">H. 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Nemamcha</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire d'Analyse Industrielle et Génie des Matériaux, Faculté des Sciences et de l'Ingénierie, Université de Guelma, BP 401</s1><s2>(24000) Guelma</s2><s3>DZA</s3><sZ>4 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>(24000) Guelma</wicri:noRegion></affiliation></author><author><name sortKey="Rehspringer, J L" sort="Rehspringer, J L" uniqKey="Rehspringer J" first="J. L." last="Rehspringer">J. L. Rehspringer</name><affiliation wicri:level="3"><inist:fA14 i1="04"><s1>Groupe de Matériaux Inorganiques, Institut de Physique et de Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-ULP, 23 rue de Loess</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName></affiliation></author><author><name sortKey="Greneche, J M" sort="Greneche, J M" uniqKey="Greneche J" first="J. M." last="Greneche">J. M. Greneche</name><affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Laboratoire de Physique de l'Etat Condensé, UMR 6087 CNRS, Université du Maine, Faculté des Sciences</s1><s2>72085 Le Mans</s2><s3>FRA</s3><sZ>6 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></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="2006">2006</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>Ball mill</term><term>Cobalt alloys</term><term>Curie point</term><term>Differential scanning calorimetry</term><term>Grain size</term><term>Heat treatments</term><term>Iron</term><term>Iron alloys</term><term>Lattice parameters</term><term>Magnetization</term><term>Microstructure</term><term>Nanocrystal</term><term>Nanoparticles</term><term>Order-disorder transformations</term><term>Phase transformations</term><term>Powder metallurgy</term><term>Saturation magnetization</term><term>Transition element alloys</term><term>Transition elements</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Aimantation</term><term>Broyeur boulet</term><term>Diffraction RX</term><term>Calorimétrie différentielle balayage</term><term>Aimantation saturation</term><term>Microstructure</term><term>Grosseur grain</term><term>Transformation phase</term><term>Métallurgie poudre</term><term>Transformation ordre désordre</term><term>Traitement thermique</term><term>Paramètre cristallin</term><term>Point Curie</term><term>Nanoparticule</term><term>Fer alliage</term><term>Cobalt alliage</term><term>Fer</term><term>Nanocristal</term><term>Métal transition alliage</term><term>Métal transition</term><term>7575</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fer</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Nanostructured Fe and Fe<sub>50</sub>Co<sub>50</sub> powders were prepared by high-energy ball milling. Microstructural and magnetic properties changes with milling time were followed by x-ray diffraction, differential scanning calorimetry and vibrating sample magnetometry. The nonequilibrium microstructure originates from a grain size reduction to about 12 nm and the introduction of internal strain up to 1.5% (root-mean-square strain). The occurrence of disorder in the ball-milled powders is evidenced by the broad exothermic reaction during the heating of ball-milled samples, the variation of lattice parameters and the increase of the saturation magnetization during the first 3 h of milling for Fe and continuously for the Fe<sub>50</sub>Co<sub>50</sub> powder mixture. According to both the reduction of Fe Curie temperature, T<sub>c</sub>, and the increase of the phase transformation T<sub>α→γ</sub>, the paramagnetic temperature domain of nanostructured bcc α-Fe is extended by about 50 °C. The Fe<sub>50</sub>Co<sub>50</sub> nanostructured powder behaves as a soft ferromagnet with low values of both the coercive field and the squareness ratio M<sub>r</sub>/M<sub>s</sub>.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li><li>Pays de la Loire</li></region><settlement><li>Le Mans</li><li>Strasbourg</li></settlement><orgName><li>Université du Maine</li></orgName></list><tree><country name="Algérie"><noRegion><name sortKey="Azzaza, S" sort="Azzaza, S" uniqKey="Azzaza S" first="S." last="Azzaza">S. Azzaza</name></noRegion><name sortKey="Alleg, S" sort="Alleg, S" uniqKey="Alleg S" first="S." last="Alleg">S. Alleg</name><name sortKey="Moumeni, H" sort="Moumeni, H" uniqKey="Moumeni H" first="H." last="Moumeni">H. Moumeni</name><name sortKey="Moumeni, H" sort="Moumeni, H" uniqKey="Moumeni H" first="H." last="Moumeni">H. Moumeni</name><name sortKey="Nemamcha, A R" sort="Nemamcha, A R" uniqKey="Nemamcha A" first="A. R." last="Nemamcha">A. R. Nemamcha</name></country><country name="France"><region name="Grand Est"><name sortKey="Rehspringer, J L" sort="Rehspringer, J L" uniqKey="Rehspringer J" first="J. L." last="Rehspringer">J. L. Rehspringer</name></region><name sortKey="Greneche, J M" sort="Greneche, J M" uniqKey="Greneche J" first="J. M." last="Greneche">J. M. Greneche</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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