Nucleation, growth and structural properties of epitaxial Co-Ag alloy films
Identifieur interne : 000183 ( PascalFrancis/Checkpoint ); précédent : 000182; suivant : 000184Nucleation, growth and structural properties of epitaxial Co-Ag alloy films
Auteurs : A. Azizi [Algérie] ; J. Arabski [France] ; A. Dinia [France]Source :
- Applied surface science [ 0169-4332 ] ; 2005.
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Abstract
Granular Co-Ag alloy films elaborated by molecular-beam epitaxy at three temperatures: 20, 250 and 450 °C, have been investigated. The influence of substrate temperatures on the growth and the structural properties is studied, using reflection high-energy electron diffraction (RHEED) and X-ray diffraction (XRD) techniques. For all growth temperatures, the in situ RHEED patterns of the Co-Ag alloys exhibit an in-plane six-fold symmetry, which indicates that the Co and Ag deposits are in epitaxy with the Ru buffer surface. At 20 °C, the RHEED patterns show a unique lattice with diffuse lines, which is a feature of a rough surface. However, at 250 °C, the RHEED patterns show double lines, which indicate the existence of two lattices, associated with Ag and Co metals. RHEED analysis indicates that the Co lattice constant relaxes to its bulk value after a critical thickness of 20 Å, while the Ag has already relaxed at the growth beginning. XRD studies give evidence of a strongly textured alloy films, along the growth direction. It is found that, at 20 °C, Co impurities are embedded in the Ag matrix. However, in the range 250-450 °C, the system segregates and gives the formation of chemically pure entities of Co and Ag.
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Arabski</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 du CNRS), 23 Rue du Loess, BP 43</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>3 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="Dinia, A" sort="Dinia, A" uniqKey="Dinia A" first="A." last="Dinia">A. Dinia</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 du CNRS), 23 Rue du Loess, BP 43</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>3 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></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">05-0311064</idno><date when="2005">2005</date><idno type="stanalyst">PASCAL 05-0311064 INIST</idno><idno type="RBID">Pascal:05-0311064</idno><idno type="wicri:Area/PascalFrancis/Corpus">000187</idno><idno type="wicri:Area/PascalFrancis/Curation">000108</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000183</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000183</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Nucleation, growth and structural properties of epitaxial Co-Ag alloy films</title><author><name sortKey="Azizi, A" sort="Azizi, A" uniqKey="Azizi A" first="A." last="Azizi">A. Azizi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire d'Energétique et d'Electrochimie du Solide, Université de Sétif</s1><s2>Sétif 19000</s2><s3>DZA</s3><sZ>1 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Sétif 19000</wicri:noRegion></affiliation></author><author><name sortKey="Arabski, J" sort="Arabski, J" uniqKey="Arabski J" first="J." last="Arabski">J. Arabski</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 du CNRS), 23 Rue du Loess, BP 43</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>3 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="Dinia, A" sort="Dinia, A" uniqKey="Dinia A" first="A." last="Dinia">A. Dinia</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 du CNRS), 23 Rue du Loess, BP 43</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>3 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></analytic><series><title level="j" type="main">Applied surface science</title><title level="j" type="abbreviated">Appl. surf. sci.</title><idno type="ISSN">0169-4332</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Applied surface science</title><title level="j" type="abbreviated">Appl. surf. sci.</title><idno type="ISSN">0169-4332</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cobalt alloys</term><term>Film growth</term><term>Granular materials</term><term>In situ</term><term>Lattice parameters</term><term>Molecular beam epitaxy</term><term>Nucleation</term><term>RHEED</term><term>Rough surfaces</term><term>Silver alloys</term><term>Surface structure</term><term>Thin films</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Structure surface</term><term>Couche mince</term><term>Nucléation</term><term>Matériau granulaire</term><term>Croissance film</term><term>Epitaxie jet moléculaire</term><term>RHEED</term><term>Diffraction RX</term><term>In situ</term><term>Surface rugueuse</term><term>Paramètre cristallin</term><term>Cobalt alliage</term><term>Argent alliage</term><term>Ag Co</term><term>Alliage AgCo</term><term>6855J</term><term>8115H</term><term>6114H</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Granular Co-Ag alloy films elaborated by molecular-beam epitaxy at three temperatures: 20, 250 and 450 °C, have been investigated. The influence of substrate temperatures on the growth and the structural properties is studied, using reflection high-energy electron diffraction (RHEED) and X-ray diffraction (XRD) techniques. For all growth temperatures, the in situ RHEED patterns of the Co-Ag alloys exhibit an in-plane six-fold symmetry, which indicates that the Co and Ag deposits are in epitaxy with the Ru buffer surface. At 20 °C, the RHEED patterns show a unique lattice with diffuse lines, which is a feature of a rough surface. However, at 250 °C, the RHEED patterns show double lines, which indicate the existence of two lattices, associated with Ag and Co metals. RHEED analysis indicates that the Co lattice constant relaxes to its bulk value after a critical thickness of 20 Å, while the Ag has already relaxed at the growth beginning. XRD studies give evidence of a strongly textured alloy films, along the growth direction. It is found that, at 20 °C, Co impurities are embedded in the Ag matrix. However, in the range 250-450 °C, the system segregates and gives the formation of chemically pure entities of Co and Ag.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0169-4332</s0></fA01><fA03 i2="1"><s0>Appl. surf. sci.</s0></fA03><fA05><s2>246</s2></fA05><fA06><s2>1-3</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Nucleation, growth and structural properties of epitaxial Co-Ag alloy films</s1></fA08><fA11 i1="01" i2="1"><s1>AZIZI (A.)</s1></fA11><fA11 i1="02" i2="1"><s1>ARABSKI (J.)</s1></fA11><fA11 i1="03" i2="1"><s1>DINIA (A.)</s1></fA11><fA14 i1="01"><s1>Laboratoire d'Energétique et d'Electrochimie du Solide, Université de Sétif</s1><s2>Sétif 19000</s2><s3>DZA</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Institut de Physique et Chimie des Matériaux de Strasbourg (UMR 7504 du CNRS), 23 Rue du Loess, BP 43</s1><s2>67034 Strasbourg</s2><s3>FRA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></fA14><fA20><s1>132-138</s1></fA20><fA21><s1>2005</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>16002</s2><s5>354000129876330200</s5></fA43><fA44><s0>0000</s0><s1>© 2005 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>29 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>05-0311064</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Applied surface science</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>Granular Co-Ag alloy films elaborated by molecular-beam epitaxy at three temperatures: 20, 250 and 450 °C, have been investigated. The influence of substrate temperatures on the growth and the structural properties is studied, using reflection high-energy electron diffraction (RHEED) and X-ray diffraction (XRD) techniques. For all growth temperatures, the in situ RHEED patterns of the Co-Ag alloys exhibit an in-plane six-fold symmetry, which indicates that the Co and Ag deposits are in epitaxy with the Ru buffer surface. At 20 °C, the RHEED patterns show a unique lattice with diffuse lines, which is a feature of a rough surface. However, at 250 °C, the RHEED patterns show double lines, which indicate the existence of two lattices, associated with Ag and Co metals. RHEED analysis indicates that the Co lattice constant relaxes to its bulk value after a critical thickness of 20 Å, while the Ag has already relaxed at the growth beginning. XRD studies give evidence of a strongly textured alloy films, along the growth direction. It is found that, at 20 °C, Co impurities are embedded in the Ag matrix. However, in the range 250-450 °C, the system segregates and gives the formation of chemically pure entities of Co and Ag.</s0></fC01><fC02 i1="01" i2="3"><s0>001B60H55J</s0></fC02><fC02 i1="02" i2="3"><s0>001B80A15H</s0></fC02><fC02 i1="03" i2="3"><s0>001B60A14H</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Structure surface</s0><s5>01</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Surface structure</s0><s5>01</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Couche mince</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Thin films</s0><s5>02</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Nucléation</s0><s5>07</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Nucleation</s0><s5>07</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Matériau granulaire</s0><s5>08</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Granular materials</s0><s5>08</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Croissance film</s0><s5>09</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Film growth</s0><s5>09</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Epitaxie jet moléculaire</s0><s5>10</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Molecular beam epitaxy</s0><s5>10</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>RHEED</s0><s5>11</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>RHEED</s0><s5>11</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Diffraction RX</s0><s5>12</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>XRD</s0><s5>12</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>In situ</s0><s5>13</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>In situ</s0><s5>13</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>In situ</s0><s5>13</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Surface rugueuse</s0><s5>14</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Rough surfaces</s0><s5>14</s5></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Paramètre cristallin</s0><s5>15</s5></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Lattice parameters</s0><s5>15</s5></fC03><fC03 i1="12" i2="3" l="FRE"><s0>Cobalt alliage</s0><s5>16</s5></fC03><fC03 i1="12" i2="3" l="ENG"><s0>Cobalt alloys</s0><s5>16</s5></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Argent alliage</s0><s5>17</s5></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Silver alloys</s0><s5>17</s5></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Ag Co</s0><s4>INC</s4><s5>32</s5></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Alliage AgCo</s0><s4>INC</s4><s5>33</s5></fC03><fC03 i1="16" i2="3" l="FRE"><s0>6855J</s0><s2>PAC</s2><s4>INC</s4><s5>45</s5></fC03><fC03 i1="17" i2="3" l="FRE"><s0>8115H</s0><s2>PAC</s2><s4>INC</s4><s5>46</s5></fC03><fC03 i1="18" i2="3" l="FRE"><s0>6114H</s0><s2>PAC</s2><s4>INC</s4><s5>47</s5></fC03><fC07 i1="01" i2="3" l="FRE"><s0>Métal transition alliage</s0><s5>62</s5></fC07><fC07 i1="01" i2="3" l="ENG"><s0>Transition element alloys</s0><s5>62</s5></fC07><fN21><s1>220</s1></fN21></pA></standard></inist><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li></region><settlement><li>Strasbourg</li></settlement></list><tree><country name="Algérie"><noRegion><name sortKey="Azizi, A" sort="Azizi, A" uniqKey="Azizi A" first="A." last="Azizi">A. Azizi</name></noRegion></country><country name="France"><region name="Grand Est"><name sortKey="Arabski, J" sort="Arabski, J" uniqKey="Arabski J" first="J." last="Arabski">J. Arabski</name></region><name sortKey="Dinia, A" sort="Dinia, A" uniqKey="Dinia A" first="A." last="Dinia">A. Dinia</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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