Anomalous properties of the YbxY1-xInCu4 alloy system
Identifieur interne : 00C086 ( Main/Repository ); précédent : 00C085; suivant : 00C087Anomalous properties of the YbxY1-xInCu4 alloy system
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Abstract
We report on lattice parameter, dc and ac susceptibility, thermopower, and resistivity measurements of the YbxY1-xInCu4 alloy system. With increasing x the system evolves from semimetallic towards more metallic character. Some anomalous properties, such as the concentration dependence of the lattice parameter can be explained as an admixture of Yb+3 and Yb+2 ions. Only for the lowest concentrations of Yb do we observe signs of the Kondo effect with a TK of about 2 K, which is much lower than expected. The absence of a signature of the Kondo effect in the thermopower data for the lowest concentrations we explain by the semimetallic character of the YInCu4 matrix. The valence transition is detected for x>0.85 by thermopower as well as by susceptibility and resistivity data.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Anomalous properties of the Yb<sub>x</sub>Y<sub>1-x</sub>InCu<sub>4</sub> alloy system</title><author><name sortKey="Ocko, M" uniqKey="Ocko M">M. Ocko</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country xml:lang="fr">Croatie</country><wicri:regionArea>Institute of Physics, P.O. Box 304, 10000, Zagreb</wicri:regionArea><wicri:noRegion>Zagreb</wicri:noRegion></affiliation></author><author><name sortKey="Sarrao, J L" uniqKey="Sarrao J">J. L. Sarrao</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Los Alamos National Laboratory, Mail Stop K 764, Los Alamos, New Mexico 87545, USA</s1><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><wicri:regionArea>Los Alamos National Laboratory, Mail Stop K 764, Los Alamos, New Mexico 87545</wicri:regionArea><wicri:noRegion>New Mexico 87545</wicri:noRegion></affiliation></author><author><name sortKey="Aviani, I" uniqKey="Aviani I">I. Aviani</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country xml:lang="fr">Croatie</country><wicri:regionArea>Institute of Physics, P.O. Box 304, 10000, Zagreb</wicri:regionArea><wicri:noRegion>Zagreb</wicri:noRegion></affiliation></author><author><name sortKey="Drobac, Dj" uniqKey="Drobac D">Dj. Drobac</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country xml:lang="fr">Croatie</country><wicri:regionArea>Institute of Physics, P.O. Box 304, 10000, Zagreb</wicri:regionArea><wicri:noRegion>Zagreb</wicri:noRegion></affiliation></author><author><name sortKey="Zivkovic, I" uniqKey="Zivkovic I">I. Zivkovic</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country xml:lang="fr">Croatie</country><wicri:regionArea>Institute of Physics, P.O. Box 304, 10000, Zagreb</wicri:regionArea><wicri:noRegion>Zagreb</wicri:noRegion></affiliation></author><author><name sortKey="Prester, M" uniqKey="Prester M">M. Prester</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country xml:lang="fr">Croatie</country><wicri:regionArea>Institute of Physics, P.O. Box 304, 10000, Zagreb</wicri:regionArea><wicri:noRegion>Zagreb</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="inist">03-0371701</idno><date when="2003-08-15">2003-08-15</date><idno type="stanalyst">PASCAL 03-0371701 AIP</idno><idno type="RBID">Pascal:03-0371701</idno><idno type="wicri:Area/Main/Corpus">00CB51</idno><idno type="wicri:Area/Main/Repository">00C086</idno></publicationStmt><seriesStmt><idno type="ISSN">1098-0121</idno><title level="j" type="abbreviated">Phys. rev., B, Condens. matter mater. phys.</title><title level="j" type="main">Physical review. B, Condensed matter and materials physics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Copper alloys</term><term>Electric resistivity</term><term>Experimental study</term><term>Indium alloys</term><term>Kondo effect</term><term>Lattice parameters</term><term>Magnetic susceptibility</term><term>Thermoelectric power</term><term>Ytterbium alloys</term><term>Yttrium alloys</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>7215Q</term><term>7520H</term><term>7215E</term><term>7215J</term><term>Etude expérimentale</term><term>Ytterbium alliage</term><term>Yttrium alliage</term><term>Indium alliage</term><term>Cuivre alliage</term><term>Pouvoir thermoélectrique</term><term>Effet Kondo</term><term>Paramètre cristallin</term><term>Susceptibilité magnétique</term><term>Résistivité électrique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We report on lattice parameter, dc and ac susceptibility, thermopower, and resistivity measurements of the Yb<sub>x</sub>Y<sub>1-x</sub>InCu<sub>4</sub> alloy system. With increasing x the system evolves from semimetallic towards more metallic character. Some anomalous properties, such as the concentration dependence of the lattice parameter can be explained as an admixture of Yb<sup>+3</sup> and Yb<sup>+2</sup> ions. Only for the lowest concentrations of Yb do we observe signs of the Kondo effect with a T<sub>K</sub> of about 2 K, which is much lower than expected. The absence of a signature of the Kondo effect in the thermopower data for the lowest concentrations we explain by the semimetallic character of the YInCu<sub>4</sub> matrix. The valence transition is detected for x>0.85 by thermopower as well as by susceptibility and resistivity data.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1098-0121</s0></fA01><fA02 i1="01"><s0>PRBMDO</s0></fA02><fA03 i2="1"><s0>Phys. rev., B, Condens. matter mater. phys.</s0></fA03><fA05><s2>68</s2></fA05><fA06><s2>7</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Anomalous properties of the Yb<sub>x</sub>Y<sub>1-x</sub>InCu<sub>4</sub> alloy system</s1></fA08><fA11 i1="01" i2="1"><s1>OCKO (M.)</s1></fA11><fA11 i1="02" i2="1"><s1>SARRAO (J. L.)</s1></fA11><fA11 i1="03" i2="1"><s1>AVIANI (I.)</s1></fA11><fA11 i1="04" i2="1"><s1>DROBAC (Dj.)</s1></fA11><fA11 i1="05" i2="1"><s1>ZIVKOVIC (I.)</s1></fA11><fA11 i1="06" i2="1"><s1>PRESTER (M.)</s1></fA11><fA14 i1="01"><s1>Institute of Physics, P.O. Box 304, 10000, Zagreb, Croatia</s1><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></fA14><fA14 i1="02"><s1>Los Alamos National Laboratory, Mail Stop K 764, Los Alamos, New Mexico 87545, USA</s1><sZ>2 aut.</sZ></fA14><fA20><s2>075102-075102-7</s2></fA20><fA21><s1>2003-08-15</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>144 B</s2></fA43><fA44><s0>8100</s0><s1>© 2003 American Institute of Physics. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>03-0371701</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Physical review. B, Condensed matter and materials physics</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>We report on lattice parameter, dc and ac susceptibility, thermopower, and resistivity measurements of the Yb<sub>x</sub>Y<sub>1-x</sub>InCu<sub>4</sub> alloy system. With increasing x the system evolves from semimetallic towards more metallic character. Some anomalous properties, such as the concentration dependence of the lattice parameter can be explained as an admixture of Yb<sup>+3</sup> and Yb<sup>+2</sup> ions. Only for the lowest concentrations of Yb do we observe signs of the Kondo effect with a T<sub>K</sub> of about 2 K, which is much lower than expected. The absence of a signature of the Kondo effect in the thermopower data for the lowest concentrations we explain by the semimetallic character of the YInCu<sub>4</sub> matrix. 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