Structure of Ce2RhIn8 : an example of complemen tary use of high-resolution neutron powder diffraction and reciprocal-space mapping to study complex materials
Identifieur interne : 008331 ( Main/Repository ); précédent : 008330; suivant : 008332Structure of Ce2RhIn8 : an example of complemen tary use of high-resolution neutron powder diffraction and reciprocal-space mapping to study complex materials
Auteurs : RBID : Pascal:06-0242577Descripteurs français
- Pascal (Inist)
- Etude expérimentale, Diffraction neutron, Rayonnement synchrotron, Formation défaut, Coexistence, Ségrégation, Polytypisme, Alignement, Dépendance température, Fermion lourd, Relation ordre, Effet contrainte, Paramètre cristallin, Monocristal, Cérium alliage, Rhodium alliage, Indium alliage, Structure lamellaire, Structure mosaïque, Réseau quadratique, Alliage CeInRh, Ce In Rh, 6166D, 6475.
English descriptors
- KwdEn :
- Alignment, Cerium alloys, Coexistence, Defect formation, Experimental study, Heavy fermions, Indium alloys, Lamellar structure, Lattice parameters, Monocrystals, Mosaic structure, Neutron diffraction, Ordering, Polytypism, Rhodium alloys, Segregation, Stress effects, Synchrotron radiation, Temperature dependence, Tetragonal lattices.
Abstract
The room-temperature crystal structure of the heavy fermion antiferromagnet Ce2RhIn8, dicerium rhodium octaindide, has been studied by a combination of high-resolution synchrotron X-ray reciprocal-space mapping of single crystals and high-resolution time-of-flight neutron powder diffraction. The structure is disordered, exhibiting a complex interplay of non-periodic, partially correlated planar defects, coexistence and segregation of polytypic phases (induced by periodic planar 'defects'), mosaicity (i.e. domain misalignment) and non-uniform strain. These effects evolve as a function of temperature in a complicated way, but they remain down to low temperatures. The room-temperature diffraction data are best represented by a complex mixture of two polytypic phases, which are affected by non-periodic, partially correlated planar defects, differ slightly in their tetragonal structures, and exhibit different mosaicities and strain values. Therefore, Ce2RhIn8 approaches the paracrystalline state, rather than the classic crystalline state and thus several of the concepts of conventional single-crystal crystallography are inapplicable. The structural results are discussed in the context of the role of disorder in the heavy-fermion state and in the interplay between superconductivity and magnetism.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Structure of Ce<sub>2</sub>RhIn<sub>8</sub> : an example of complemen tary use of high-resolution neutron powder diffraction and reciprocal-space mapping to study complex materials</title><author><name sortKey="Moshopoulou, E G" uniqKey="Moshopoulou E">E. G. Moshopoulou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>National Center for Scientific Research 'Demokritos', Institute of Materials Science</s1><s2>15310 Agia Paraskevi</s2><s3>GRC</s3><sZ>1 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>15310 Agia Paraskevi</wicri:noRegion></affiliation></author><author><name sortKey="Ibberson, R M" uniqKey="Ibberson R">R. M. Ibberson</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>ISIS Facility, CCLRC-Rutherford Appleton Laboratory</s1><s2>Chilton, Didcot, Oxon OX11 0QX, England</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Chilton, Didcot, Oxon OX11 0QX, England</wicri:noRegion></affiliation></author><author><name sortKey="Sarrao, J L" uniqKey="Sarrao J">J. L. Sarrao</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Los Alamos National Laboratory, MST-10, MS K764</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">État du Mississippi</region></placeName></affiliation></author><author><name sortKey="Thompson, J D" uniqKey="Thompson J">J. D. Thompson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Los Alamos National Laboratory, MST-10, MS K764</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">État du Mississippi</region></placeName></affiliation></author><author><name sortKey="Fisk, Z" uniqKey="Fisk Z">Z. Fisk</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Los Alamos National Laboratory, MST-10, MS K764</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">État du Mississippi</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="inist">06-0242577</idno><date when="2006">2006</date><idno type="stanalyst">PASCAL 06-0242577 INIST</idno><idno type="RBID">Pascal:06-0242577</idno><idno type="wicri:Area/Main/Corpus">009006</idno><idno type="wicri:Area/Main/Repository">008331</idno></publicationStmt><seriesStmt><idno type="ISSN">0108-7681</idno><title level="j" type="abbreviated">Acta crystallogr., Sect. B Struct. sci.</title><title level="j" type="main">Acta crystallographica. Section B, Structural science</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alignment</term><term>Cerium alloys</term><term>Coexistence</term><term>Defect formation</term><term>Experimental study</term><term>Heavy fermions</term><term>Indium alloys</term><term>Lamellar structure</term><term>Lattice parameters</term><term>Monocrystals</term><term>Mosaic structure</term><term>Neutron diffraction</term><term>Ordering</term><term>Polytypism</term><term>Rhodium alloys</term><term>Segregation</term><term>Stress effects</term><term>Synchrotron radiation</term><term>Temperature dependence</term><term>Tetragonal lattices</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term><term>Diffraction neutron</term><term>Rayonnement synchrotron</term><term>Formation défaut</term><term>Coexistence</term><term>Ségrégation</term><term>Polytypisme</term><term>Alignement</term><term>Dépendance température</term><term>Fermion lourd</term><term>Relation ordre</term><term>Effet contrainte</term><term>Paramètre cristallin</term><term>Monocristal</term><term>Cérium alliage</term><term>Rhodium alliage</term><term>Indium alliage</term><term>Structure lamellaire</term><term>Structure mosaïque</term><term>Réseau quadratique</term><term>Alliage CeInRh</term><term>Ce In Rh</term><term>6166D</term><term>6475</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The room-temperature crystal structure of the heavy fermion antiferromagnet Ce<sub>2</sub>RhIn<sub>8</sub>, dicerium rhodium octaindide, has been studied by a combination of high-resolution synchrotron X-ray reciprocal-space mapping of single crystals and high-resolution time-of-flight neutron powder diffraction. The structure is disordered, exhibiting a complex interplay of non-periodic, partially correlated planar defects, coexistence and segregation of polytypic phases (induced by periodic planar 'defects'), mosaicity (i.e. domain misalignment) and non-uniform strain. These effects evolve as a function of temperature in a complicated way, but they remain down to low temperatures. The room-temperature diffraction data are best represented by a complex mixture of two polytypic phases, which are affected by non-periodic, partially correlated planar defects, differ slightly in their tetragonal structures, and exhibit different mosaicities and strain values. Therefore, Ce<sub>2</sub>RhIn<sub>8</sub> approaches the paracrystalline state, rather than the classic crystalline state and thus several of the concepts of conventional single-crystal crystallography are inapplicable. The structural results are discussed in the context of the role of disorder in the heavy-fermion state and in the interplay between superconductivity and magnetism.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0108-7681</s0></fA01><fA02 i1="01"><s0>ASBSDK</s0></fA02><fA03 i2="1"><s0>Acta crystallogr., Sect. B Struct. sci.</s0></fA03><fA05><s2>62</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Structure of Ce<sub>2</sub>RhIn<sub>8</sub> : an example of complemen tary use of high-resolution neutron powder diffraction and reciprocal-space mapping to study complex materials</s1></fA08><fA11 i1="01" i2="1"><s1>MOSHOPOULOU (E. G.)</s1></fA11><fA11 i1="02" i2="1"><s1>IBBERSON (R. M.)</s1></fA11><fA11 i1="03" i2="1"><s1>SARRAO (J. L.)</s1></fA11><fA11 i1="04" i2="1"><s1>THOMPSON (J. D.)</s1></fA11><fA11 i1="05" i2="1"><s1>FISK (Z.)</s1></fA11><fA14 i1="01"><s1>National Center for Scientific Research 'Demokritos', Institute of Materials Science</s1><s2>15310 Agia Paraskevi</s2><s3>GRC</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>ISIS Facility, CCLRC-Rutherford Appleton Laboratory</s1><s2>Chilton, Didcot, Oxon OX11 0QX, England</s2><s3>GBR</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Los Alamos National Laboratory, MST-10, MS K764</s1><s2>Los Alamos, NM 87545</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></fA14><fA20><s1>173-189</s1></fA20><fA21><s1>2006</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>5160B</s2><s5>354000156833870010</s5></fA43><fA44><s0>0000</s0><s1>© 2006 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1 p.1/4</s0></fA45><fA47 i1="01" i2="1"><s0>06-0242577</s0></fA47><fA60><s1>P</s1><s3>PR</s3></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Acta crystallographica. Section B, Structural science</s0></fA64><fA66 i1="01"><s0>GBR</s0></fA66><fC01 i1="01" l="ENG"><s0>The room-temperature crystal structure of the heavy fermion antiferromagnet Ce<sub>2</sub>RhIn<sub>8</sub>, dicerium rhodium octaindide, has been studied by a combination of high-resolution synchrotron X-ray reciprocal-space mapping of single crystals and high-resolution time-of-flight neutron powder diffraction. The structure is disordered, exhibiting a complex interplay of non-periodic, partially correlated planar defects, coexistence and segregation of polytypic phases (induced by periodic planar 'defects'), mosaicity (i.e. domain misalignment) and non-uniform strain. These effects evolve as a function of temperature in a complicated way, but they remain down to low temperatures. The room-temperature diffraction data are best represented by a complex mixture of two polytypic phases, which are affected by non-periodic, partially correlated planar defects, differ slightly in their tetragonal structures, and exhibit different mosaicities and strain values. Therefore, Ce<sub>2</sub>RhIn<sub>8</sub> approaches the paracrystalline state, rather than the classic crystalline state and thus several of the concepts of conventional single-crystal crystallography are inapplicable. The structural results are discussed in the context of the role of disorder in the heavy-fermion state and in the interplay between superconductivity and magnetism.</s0></fC01><fC02 i1="01" i2="3"><s0>001B60A66D</s0></fC02><fC02 i1="02" i2="3"><s0>001B60D75</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Etude expérimentale</s0><s5>02</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Experimental study</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Diffraction neutron</s0><s5>03</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Neutron diffraction</s0><s5>03</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Rayonnement synchrotron</s0><s5>04</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Synchrotron radiation</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Formation défaut</s0><s5>05</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Defect formation</s0><s5>05</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Formación defecto</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Coexistence</s0><s5>06</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Coexistence</s0><s5>06</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Coexistencia</s0><s5>06</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Ségrégation</s0><s5>07</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Segregation</s0><s5>07</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Polytypisme</s0><s5>08</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Polytypism</s0><s5>08</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Alignement</s0><s5>09</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Alignment</s0><s5>09</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Dépendance température</s0><s5>10</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Temperature dependence</s0><s5>10</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Fermion lourd</s0><s5>11</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Heavy fermions</s0><s5>11</s5></fC03><fC03 i1="11" i2="X" l="FRE"><s0>Relation ordre</s0><s5>12</s5></fC03><fC03 i1="11" i2="X" l="ENG"><s0>Ordering</s0><s5>12</s5></fC03><fC03 i1="11" i2="X" l="SPA"><s0>Relación orden</s0><s5>12</s5></fC03><fC03 i1="12" i2="3" l="FRE"><s0>Effet contrainte</s0><s5>13</s5></fC03><fC03 i1="12" i2="3" l="ENG"><s0>Stress effects</s0><s5>13</s5></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Paramètre cristallin</s0><s5>14</s5></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Lattice parameters</s0><s5>14</s5></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Monocristal</s0><s5>15</s5></fC03><fC03 i1="14" i2="3" l="ENG"><s0>Monocrystals</s0><s5>15</s5></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Cérium alliage</s0><s5>16</s5></fC03><fC03 i1="15" i2="3" l="ENG"><s0>Cerium alloys</s0><s5>16</s5></fC03><fC03 i1="16" i2="3" l="FRE"><s0>Rhodium alliage</s0><s5>17</s5></fC03><fC03 i1="16" i2="3" l="ENG"><s0>Rhodium alloys</s0><s5>17</s5></fC03><fC03 i1="17" i2="3" l="FRE"><s0>Indium alliage</s0><s5>18</s5></fC03><fC03 i1="17" i2="3" l="ENG"><s0>Indium alloys</s0><s5>18</s5></fC03><fC03 i1="18" i2="X" l="FRE"><s0>Structure lamellaire</s0><s5>19</s5></fC03><fC03 i1="18" i2="X" l="ENG"><s0>Lamellar structure</s0><s5>19</s5></fC03><fC03 i1="18" i2="X" l="SPA"><s0>Estructura lamelar</s0><s5>19</s5></fC03><fC03 i1="19" i2="3" l="FRE"><s0>Structure mosaïque</s0><s5>20</s5></fC03><fC03 i1="19" i2="3" l="ENG"><s0>Mosaic structure</s0><s5>20</s5></fC03><fC03 i1="20" i2="3" l="FRE"><s0>Réseau quadratique</s0><s5>21</s5></fC03><fC03 i1="20" i2="3" l="ENG"><s0>Tetragonal lattices</s0><s5>21</s5></fC03><fC03 i1="21" i2="3" l="FRE"><s0>Alliage CeInRh</s0><s4>INC</s4><s5>52</s5></fC03><fC03 i1="22" i2="3" l="FRE"><s0>Ce In Rh</s0><s4>INC</s4><s5>53</s5></fC03><fC03 i1="23" i2="3" l="FRE"><s0>6166D</s0><s2>PAC</s2><s4>INC</s4><s5>56</s5></fC03><fC03 i1="24" i2="3" l="FRE"><s0>6475</s0><s2>PAC</s2><s4>INC</s4><s5>57</s5></fC03><fC07 i1="01" i2="3" l="FRE"><s0>Composé minéral</s0><s5>48</s5></fC07><fC07 i1="01" i2="3" l="ENG"><s0>Inorganic compounds</s0><s5>48</s5></fC07><fC07 i1="02" i2="3" l="FRE"><s0>Métal transition alliage</s0><s5>49</s5></fC07><fC07 i1="02" i2="3" l="ENG"><s0>Transition element alloys</s0><s5>49</s5></fC07><fC07 i1="03" i2="3" l="FRE"><s0>Lanthanide alliage</s0><s5>50</s5></fC07><fC07 i1="03" i2="3" l="ENG"><s0>Rare earth alloys</s0><s5>50</s5></fC07><fN21><s1>156</s1></fN21><fN44 i1="01"><s1>PSI</s1></fN44><fN82><s1>PSI</s1></fN82></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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