Mean-coordination number dependence of the fragility in Ge-Se-In glass-forming liquids
Identifieur interne : 007569 ( Main/Repository ); précédent : 007568; suivant : 007570Mean-coordination number dependence of the fragility in Ge-Se-In glass-forming liquids
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Abstract
Differential scanning calorimetry measurements have been performed on elemental Se as well as on GexSe94-xIn6 (x = 4, 8, and 11 at%) and on GeySe88-yIn12 (y = 5, 7, and 9 at%) chalcogenide glasses. From the cooling rate dependence of the fictive temperature, the apparent activation energies, Δh*, and the fragility indices, m, as defined in the strong-fragile glass-forming liquid concept, are determined. It is found that, in Ge-Se-In system, there is an evolution from strong (m = 67) to fragile (m = 116) glass-forming liquids. The dependence of 'm' on the mean-coordination number, Z, is also obtained. This dependence is rationalized by assuming that, in this glassy alloy system, there is a tendency for the formation of In2Se3 clusters.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Mean-coordination number dependence of the fragility in Ge-Se-In glass-forming liquids</title><author><name sortKey="Saffarini, G" uniqKey="Saffarini G">G. Saffarini</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire PBM, UMR 6522, LECAP, Institut des Matériaux de Rouen, Faculté des Sciences, Avenue de l'Université BP 12</s1><s2>76801 Saint Etienne du Rouvray</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Haute-Normandie</region><settlement type="city">Saint Etienne du Rouvray</settlement></placeName></affiliation></author><author><name sortKey="Saiter, A" uniqKey="Saiter A">A. Saiter</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire PBM, UMR 6522, LECAP, Institut des Matériaux de Rouen, Faculté des Sciences, Avenue de l'Université BP 12</s1><s2>76801 Saint Etienne du Rouvray</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Haute-Normandie</region><settlement type="city">Saint Etienne du Rouvray</settlement></placeName></affiliation></author><author><name sortKey="Garda, M R" uniqKey="Garda M">M. R. Garda</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire PBM, UMR 6522, LECAP, Institut des Matériaux de Rouen, Faculté des Sciences, Avenue de l'Université BP 12</s1><s2>76801 Saint Etienne du Rouvray</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Haute-Normandie</region><settlement type="city">Saint Etienne du Rouvray</settlement></placeName></affiliation></author><author><name sortKey="Saiter, J M" uniqKey="Saiter J">J. M. Saiter</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire PBM, UMR 6522, LECAP, Institut des Matériaux de Rouen, Faculté des Sciences, Avenue de l'Université BP 12</s1><s2>76801 Saint Etienne du Rouvray</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Haute-Normandie</region><settlement type="city">Saint Etienne du Rouvray</settlement></placeName></affiliation></author></titleStmt><publicationStmt><idno type="inist">07-0089158</idno><date when="2007">2007</date><idno type="stanalyst">PASCAL 07-0089158 INIST</idno><idno type="RBID">Pascal:07-0089158</idno><idno type="wicri:Area/Main/Corpus">008235</idno><idno type="wicri:Area/Main/Repository">007569</idno></publicationStmt><seriesStmt><idno type="ISSN">0921-4526</idno><title level="j" type="abbreviated">Physica, B Condens. matter</title><title level="j" type="main">Physica. B, Condensed matter</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term><term>Chalcogenide glasses</term><term>Cooling rate</term><term>Coordination number</term><term>Differential scanning calorimetry</term><term>Germanium selenides</term><term>Glass formation</term><term>Glass transition</term><term>Indium selenides</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Coordinence</term><term>Formation verre</term><term>Calorimétrie différentielle balayage</term><term>Vitesse refroidissement</term><term>Energie activation</term><term>Transition vitreuse</term><term>Indium séléniure</term><term>Verre chalcogénure</term><term>Germanium séléniure</term><term>6470P</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Differential scanning calorimetry measurements have been performed on elemental Se as well as on Ge<sub>x</sub>Se<sub>94-x</sub>In<sub>6</sub> (x = 4, 8, and 11 at%) and on Ge<sub>y</sub>Se<sub>88-y</sub>In<sub>12</sub> (y = 5, 7, and 9 at%) chalcogenide glasses. From the cooling rate dependence of the fictive temperature, the apparent activation energies, Δh*, and the fragility indices, m, as defined in the strong-fragile glass-forming liquid concept, are determined. It is found that, in Ge-Se-In system, there is an evolution from strong (m = 67) to fragile (m = 116) glass-forming liquids. The dependence of 'm' on the mean-coordination number, Z, is also obtained. This dependence is rationalized by assuming that, in this glassy alloy system, there is a tendency for the formation of In<sub>2</sub>Se<sub>3</sub> clusters.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0921-4526</s0></fA01><fA03 i2="1"><s0>Physica, B Condens. matter</s0></fA03><fA05><s2>389</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Mean-coordination number dependence of the fragility in Ge-Se-In glass-forming liquids</s1></fA08><fA11 i1="01" i2="1"><s1>SAFFARINI (G.)</s1></fA11><fA11 i1="02" i2="1"><s1>SAITER (A.)</s1></fA11><fA11 i1="03" i2="1"><s1>GARDA (M. R.)</s1></fA11><fA11 i1="04" i2="1"><s1>SAITER (J. M.)</s1></fA11><fA14 i1="01"><s1>Laboratoire PBM, UMR 6522, LECAP, Institut des Matériaux de Rouen, Faculté des Sciences, Avenue de l'Université BP 12</s1><s2>76801 Saint Etienne du Rouvray</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>275-280</s1></fA20><fA21><s1>2007</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>145B</s2><s5>354000159311660110</s5></fA43><fA44><s0>0000</s0><s1>© 2007 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>44 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>07-0089158</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Physica. B, Condensed matter</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>Differential scanning calorimetry measurements have been performed on elemental Se as well as on Ge<sub>x</sub>Se<sub>94-x</sub>In<sub>6</sub> (x = 4, 8, and 11 at%) and on Ge<sub>y</sub>Se<sub>88-y</sub>In<sub>12</sub> (y = 5, 7, and 9 at%) chalcogenide glasses. From the cooling rate dependence of the fictive temperature, the apparent activation energies, Δh*, and the fragility indices, m, as defined in the strong-fragile glass-forming liquid concept, are determined. It is found that, in Ge-Se-In system, there is an evolution from strong (m = 67) to fragile (m = 116) glass-forming liquids. The dependence of 'm' on the mean-coordination number, Z, is also obtained. This dependence is rationalized by assuming that, in this glassy alloy system, there is a tendency for the formation of In<sub>2</sub>Se<sub>3</sub> clusters.</s0></fC01><fC02 i1="01" i2="3"><s0>001B60D70P</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Coordinence</s0><s5>02</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Coordination number</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Formation verre</s0><s5>03</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Glass formation</s0><s5>03</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Calorimétrie différentielle balayage</s0><s5>04</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Differential scanning calorimetry</s0><s5>04</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Vitesse refroidissement</s0><s5>05</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Cooling rate</s0><s5>05</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Energie activation</s0><s5>06</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Activation energy</s0><s5>06</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Transition vitreuse</s0><s5>07</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Glass transition</s0><s5>07</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Indium séléniure</s0><s2>NK</s2><s5>15</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Indium selenides</s0><s2>NK</s2><s5>15</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Verre chalcogénure</s0><s5>16</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Chalcogenide glasses</s0><s5>16</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Germanium séléniure</s0><s2>NK</s2><s5>17</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Germanium selenides</s0><s2>NK</s2><s5>17</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>6470P</s0><s4>INC</s4><s5>60</s5></fC03><fN21><s1>057</s1></fN21></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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