Instability of the Co-magnetic moment in Tm(Co,M)2 (M=Al,Si)
Identifieur interne : 002B03 ( Main/Exploration ); précédent : 002B02; suivant : 002B04Instability of the Co-magnetic moment in Tm(Co,M)2 (M=Al,Si)
Auteurs : N. V. Baranov [Russie] ; M. I. Bartashevich [Russie, Japon] ; T. Goto [Japon] ; A. A. Yermakov [Russie] ; A. E. Karkin [Russie] ; A. N. Pirogov [Russie] ; A. E. Teplykh [Russie]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 1997.
Descripteurs français
- Pascal (Inist)
- Propriété magnétique, Moment magnétique, Composé intermétallique, Alliage ternaire, Alliage base thulium, Cobalt alliage, Aluminium alliage, Silicium alliage, Magnétostriction, Mesure magnétique, Paramètre cristallin, Dépendance température, Etude expérimentale, Caractéristique magnétique, Diffraction neutron, Structure cristalline, Alliage TmCoAl, Al Co Tm, Alliage TmCoSi, Co Si Tm, 7530C.
English descriptors
- KwdEn :
- Aluminium alloys, Cobalt alloys, Crystal structure, Experimental study, Intermetallic compounds, Lattice parameters, Magnetic measurement, Magnetic moments, Magnetic properties, Magnetization curve, Magnetostriction, Neutron diffraction, Silicon alloys, Temperature dependence, Ternary alloys, Thulium base alloys.
Abstract
Copyright (c) 1997 Elsevier Science S.A. All rights reserved. Tm(Co1-xAlx)2 compounds with x=0; 0.05; 0.10 and Tm(Co0.95Si0.05)2 have been studied by means of ac-susceptibility, magnetization, magnetostriction, electrical resistivity and neutron diffraction measurements. It is shown that the magnetic state of TmCo2 is characterized by the absence of the Co-magnetic moment and by the presence of the localized spin density fluctuations in the d-subsystem at low temperatures and is strongly affected by an applied magnetic field. The partial substitution of Al or Si for Co in TmCo2 leads to the appearance of the long range magnetic order and gives rise to the Co-magnetic moment up to MCo=1.25 μB. In Tm(Co0.9Al0.1)2, the field-induced phase transition in d-subsystem was observed at the critical field Bc≃17 T using high-field magnetization and magnetostriction measurements. This phase transition is associated with a collapse of the Co-magnetic moment. Instability of the Co-magnetic moment in TmCo2 at the substitution and in an applied magnetic field is explained by the closeness of the molecular field acting on the Co-subsystem to the critical value of the Co metamagnetic transition field.
Affiliations:
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V." last="Baranov">N. V. Baranov</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics and Applied Mathematics, Ural State University, 620083</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></affiliation></author><author><name sortKey="Bartashevich, M I" sort="Bartashevich, M I" uniqKey="Bartashevich M" first="M. I." last="Bartashevich">M. I. Bartashevich</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics and Applied Mathematics, Ural State University, 620083</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></affiliation><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Japon</country><placeName><settlement type="city">Tokyo</settlement><region type="région">Région de Kantō</region></placeName></affiliation></author><author><name sortKey="Goto, T" sort="Goto, T" uniqKey="Goto T" first="T." last="Goto">T. Goto</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Japon</country><placeName><settlement type="city">Tokyo</settlement><region type="région">Région de Kantō</region></placeName></affiliation></author><author><name sortKey="Yermakov, A A" sort="Yermakov, A A" uniqKey="Yermakov A" first="A. A." last="Yermakov">A. A. Yermakov</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics and Applied Mathematics, Ural State University, 620083</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></affiliation></author><author><name sortKey="Karkin, A E" sort="Karkin, A E" uniqKey="Karkin A" first="A. E." last="Karkin">A. E. Karkin</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Institute for Metal Physics, Russian Academy of Sciences, 620219</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></affiliation></author><author><name sortKey="Pirogov, A N" sort="Pirogov, A N" uniqKey="Pirogov A" first="A. N." last="Pirogov">A. N. Pirogov</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Institute for Metal Physics, Russian Academy of Sciences, 620219</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></affiliation></author><author><name sortKey="Teplykh, A E" sort="Teplykh, A E" uniqKey="Teplykh A" first="A. E." last="Teplykh">A. E. Teplykh</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Institute for Metal Physics, Russian Academy of Sciences, 620219</s1><s2>Ekaterinburg</s2><s3>RUS</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>Ekaterinburg</wicri:noRegion></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="1997">1997</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>Aluminium alloys</term><term>Cobalt alloys</term><term>Crystal structure</term><term>Experimental study</term><term>Intermetallic compounds</term><term>Lattice parameters</term><term>Magnetic measurement</term><term>Magnetic moments</term><term>Magnetic properties</term><term>Magnetization curve</term><term>Magnetostriction</term><term>Neutron diffraction</term><term>Silicon alloys</term><term>Temperature dependence</term><term>Ternary alloys</term><term>Thulium base alloys</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Propriété magnétique</term><term>Moment magnétique</term><term>Composé intermétallique</term><term>Alliage ternaire</term><term>Alliage base thulium</term><term>Cobalt alliage</term><term>Aluminium alliage</term><term>Silicium alliage</term><term>Magnétostriction</term><term>Mesure magnétique</term><term>Paramètre cristallin</term><term>Dépendance température</term><term>Etude expérimentale</term><term>Caractéristique magnétique</term><term>Diffraction neutron</term><term>Structure cristalline</term><term>Alliage TmCoAl</term><term>Al Co Tm</term><term>Alliage TmCoSi</term><term>Co Si Tm</term><term>7530C</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Copyright (c) 1997 Elsevier Science S.A. All rights reserved. Tm(Co<sub>1-x</sub>Al<sub>x</sub>)<sub>2</sub> compounds with x=0; 0.05; 0.10 and Tm(Co<sub>0.95</sub>Si<sub>0.05</sub>)<sub>2</sub> have been studied by means of ac-susceptibility, magnetization, magnetostriction, electrical resistivity and neutron diffraction measurements. It is shown that the magnetic state of TmCo<sub>2</sub> is characterized by the absence of the Co-magnetic moment and by the presence of the localized spin density fluctuations in the d-subsystem at low temperatures and is strongly affected by an applied magnetic field. The partial substitution of Al or Si for Co in TmCo<sub>2</sub> leads to the appearance of the long range magnetic order and gives rise to the Co-magnetic moment up to M<sub>Co</sub>=1.25 μ<sub>B</sub>. In Tm(Co<sub>0.9</sub>Al<sub>0.1</sub>)<sub>2</sub>, the field-induced phase transition in d-subsystem was observed at the critical field B<sub>c</sub>≃17 T using high-field magnetization and magnetostriction measurements. This phase transition is associated with a collapse of the Co-magnetic moment. Instability of the Co-magnetic moment in TmCo<sub>2</sub> at the substitution and in an applied magnetic field is explained by the closeness of the molecular field acting on the Co-subsystem to the critical value of the Co metamagnetic transition field.</div></front></TEI><affiliations><list><country><li>Japon</li><li>Russie</li></country><region><li>Région de Kantō</li></region><settlement><li>Tokyo</li></settlement></list><tree><country name="Russie"><noRegion><name sortKey="Baranov, N V" sort="Baranov, N V" uniqKey="Baranov N" first="N. V." last="Baranov">N. V. Baranov</name></noRegion><name sortKey="Bartashevich, M I" sort="Bartashevich, M I" uniqKey="Bartashevich M" first="M. I." last="Bartashevich">M. I. Bartashevich</name><name sortKey="Karkin, A E" sort="Karkin, A E" uniqKey="Karkin A" first="A. E." last="Karkin">A. E. Karkin</name><name sortKey="Pirogov, A N" sort="Pirogov, A N" uniqKey="Pirogov A" first="A. N." last="Pirogov">A. N. Pirogov</name><name sortKey="Teplykh, A E" sort="Teplykh, A E" uniqKey="Teplykh A" first="A. E." last="Teplykh">A. E. Teplykh</name><name sortKey="Yermakov, A A" sort="Yermakov, A A" uniqKey="Yermakov A" first="A. A." last="Yermakov">A. A. Yermakov</name></country><country name="Japon"><region name="Région de Kantō"><name sortKey="Bartashevich, M I" sort="Bartashevich, M I" uniqKey="Bartashevich M" first="M. I." last="Bartashevich">M. I. Bartashevich</name></region><name sortKey="Goto, T" sort="Goto, T" uniqKey="Goto T" first="T." last="Goto">T. Goto</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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