Study of the peak effect in pure, Pb and Pb + Y doped Bi-2212 single crystals
Identifieur interne : 005677 ( PascalFrancis/Checkpoint ); précédent : 005676; suivant : 005678Study of the peak effect in pure, Pb and Pb + Y doped Bi-2212 single crystals
Auteurs : X. L. Wang [Australie] ; H. K. Liu [Australie] ; S. X. Dou [Australie]Source :
- Physica. C. Superconductivity and its applications
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Abstract
The peak effect (PE) in pure, Pb and Pb + Y doped Bi2212 single crystals with different oxygen doping levels was studied by measuring M-H loops over a wide temperature range. The PE in pure Bi2212 crystals was obtained only for crystals with optimal oxygen doping and over-doping but not observed for oxygen under-doped crystals. For Pb doped Bi2212 crystals, the PE appeared at a higher field than in the pure crystals and persisted up to Tc. For (Bi1.64Pb0.36)Sr2Ca1-xYxCu2O8+y (x = 0, 0.05, 0.11, 0.33) single crystals, results show that at low temperatures, the peak field is smaller than in solely Pb doped crystals and decreases as x increases (x > 0.1). However, the peak field at high temperature for the x = 0.05 sample is higher than for heavily Pb doped Bi2212 crystals, indicative of strong pinning due to the co-doping. The formation of Bi5+ rich clusters, which cause the reduction of the c-axis lattice parameter and ρc, is proposed to be responsible for the appearance of the PE in the undoped crystals. The co-existence of Pb4+- and Bi5+-rich clusters causes the strong PE in Pb doped Bi2212 crystals. Y3+ is proposed to be an effective dopant at low doping levels for flux pinning at high temperatures. The PE for all the crystals was characterised by plotting (Hmax -Hmin)/Hmax vs T/Tc, where Hmin and Hmax represent the fields at which the magnetisation starts to increase (Hmin) and reaches a maximum (Hmax) at the peak position. Results showed that the evolution of the peak effect with temperature in the Pb and Pb + Y doped crystals was similar to that seen in Y123.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Study of the peak effect in pure, Pb and Pb + Y doped Bi-2212 single crystals</title><author><name sortKey="Wang, X L" sort="Wang, X L" uniqKey="Wang X" first="X. L." last="Wang">X. L. Wang</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Liu, H K" sort="Liu, H K" uniqKey="Liu H" first="H. K." last="Liu">H. K. Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Dou, S X" sort="Dou, S X" uniqKey="Dou S" first="S. X." last="Dou">S. X. Dou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">02-0206085</idno><date when="2001">2001</date><idno type="stanalyst">PASCAL 02-0206085 INIST</idno><idno type="RBID">Pascal:02-0206085</idno><idno type="wicri:Area/PascalFrancis/Corpus">005826</idno><idno type="wicri:Area/PascalFrancis/Curation">000913</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">005677</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">005677</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Study of the peak effect in pure, Pb and Pb + Y doped Bi-2212 single crystals</title><author><name sortKey="Wang, X L" sort="Wang, X L" uniqKey="Wang X" first="X. L." last="Wang">X. L. Wang</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Liu, H K" sort="Liu, H K" uniqKey="Liu H" first="H. K." last="Liu">H. K. Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Dou, S X" sort="Dou, S X" uniqKey="Dou S" first="S. X." last="Dou">S. X. Dou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Physica. C. Superconductivity and its applications</title></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Physica. C. Superconductivity and its applications</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bismuth oxides</term><term>Calcium oxides</term><term>Composition effect</term><term>Copper oxides</term><term>Experimental study</term><term>Flux pinning</term><term>High-Tc superconductors</term><term>Lead oxides</term><term>Magnetic hysteresis</term><term>Magnetization</term><term>Monocrystals</term><term>Nonstoichiometry</term><term>Peak effect</term><term>Strontium oxides</term><term>Temperature dependence</term><term>Yttrium oxides</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Effet pic</term><term>Non stoechiométrie</term><term>Hystérésis magnétique</term><term>Dépendance température</term><term>Aimantation</term><term>Effet composition</term><term>Ancrage flux</term><term>Supraconducteur haute température</term><term>Monocristal</term><term>Bismuth oxyde</term><term>Calcium oxyde</term><term>Plomb oxyde</term><term>Cuivre oxyde</term><term>Strontium oxyde</term><term>Yttrium oxyde</term><term>Etude expérimentale</term><term>7425H</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The peak effect (PE) in pure, Pb and Pb + Y doped Bi2212 single crystals with different oxygen doping levels was studied by measuring M-H loops over a wide temperature range. The PE in pure Bi2212 crystals was obtained only for crystals with optimal oxygen doping and over-doping but not observed for oxygen under-doped crystals. For Pb doped Bi2212 crystals, the PE appeared at a higher field than in the pure crystals and persisted up to T<sub>c</sub>. For (Bi<sub>1.64</sub>Pb<sub>0.36</sub>)Sr<sub>2</sub>Ca<sub>1-x</sub>Y<sub>x</sub>Cu<sub>2</sub>O<sub>8+y</sub> (x = 0, 0.05, 0.11, 0.33) single crystals, results show that at low temperatures, the peak field is smaller than in solely Pb doped crystals and decreases as x increases (x > 0.1). However, the peak field at high temperature for the x = 0.05 sample is higher than for heavily Pb doped Bi2212 crystals, indicative of strong pinning due to the co-doping. The formation of Bi<sup>5+</sup> rich clusters, which cause the reduction of the c-axis lattice parameter and ρ<sub>c</sub>, is proposed to be responsible for the appearance of the PE in the undoped crystals. The co-existence of Pb<sup>4+</sup>- and Bi<sup>5+</sup>-rich clusters causes the strong PE in Pb doped Bi2212 crystals. Y<sup>3+</sup> is proposed to be an effective dopant at low doping levels for flux pinning at high temperatures. The PE for all the crystals was characterised by plotting (H<sub>max</sub> -H<sub>min</sub>)/H<sub>max</sub> vs T/T<sub>c</sub>, where H<sub>min</sub> and H<sub>max</sub> represent the fields at which the magnetisation starts to increase (H<sub>min</sub>) and reaches a maximum (H<sub>max</sub>) at the peak position. Results showed that the evolution of the peak effect with temperature in the Pb and Pb + Y doped crystals was similar to that seen in Y123.</div></front></TEI><inist><standard h6="B"><pA><fA05><s2>364-65</s2></fA05><fA08 i1="01" i2="1" l="ENG"><s1>Study of the peak effect in pure, Pb and Pb + Y doped Bi-2212 single crystals</s1></fA08><fA09 i1="01" i2="1" l="ENG"><s1>New<sup>3</sup>SC-3: Proceedings of the third International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials, Honolulu, Hawaii, USA, January 15-19, 2001</s1></fA09><fA11 i1="01" i2="1"><s1>WANG (X. L.)</s1></fA11><fA11 i1="02" i2="1"><s1>LIU (H. K.)</s1></fA11><fA11 i1="03" i2="1"><s1>DOU (S. X.)</s1></fA11><fA12 i1="01" i2="1"><s1>FAN (J. D.)</s1><s9>ed.</s9></fA12><fA12 i1="02" i2="1"><s1>MALOZOVSKY (Y. M.)</s1><s9>ed.</s9></fA12><fA12 i1="03" i2="1"><s1>BAGAYOKO (D.)</s1><s9>ed.</s9></fA12><fA12 i1="04" i2="1"><s1>BOK (J.)</s1><s9>ed.</s9></fA12><fA12 i1="05" i2="1"><s1>ODA (M.)</s1><s9>ed.</s9></fA12><fA12 i1="06" i2="1"><s1>SALK (S. H.)</s1><s9>ed.</s9></fA12><fA12 i1="07" i2="1"><s1>WANG (J. T.)</s1><s9>ed.</s9></fA12><fA12 i1="08" i2="1"><s1>WANG (Z. D.)</s1><s9>ed.</s9></fA12><fA12 i1="09" i2="1"><s1>ZHAO (B. R.)</s1><s9>ed.</s9></fA12><fA14 i1="01"><s1>Institute for Superconducting and Electronic Materials, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></fA14><fA15 i1="01"><s1>Southern University</s1><s2>Baton Rouge, LA</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>7 aut.</sZ></fA15><fA15 i1="02"><s1>ESPCI</s1><s2>Paris</s2><s3>FRA</s3><sZ>4 aut.</sZ></fA15><fA15 i1="03"><s1>Hokkaido University</s1><s2>Sapporo</s2><s3>JPN</s3><sZ>5 aut.</sZ></fA15><fA15 i1="04"><s1>Pohang University of Science & Technology</s1><s2>Pohang</s2><s3>KOR</s3><sZ>6 aut.</sZ></fA15><fA15 i1="05"><s1>University of Hong Kong</s1><s2>Hong Kong</s2><s3>CHN</s3><sZ>8 aut.</sZ></fA15><fA15 i1="06"><s1>Chinese Academy of Sciences</s1><s2>Beijing</s2><s3>CHN</s3><sZ>9 aut.</sZ></fA15><fA20><s1>622-625</s1></fA20><fA21><s1>2001</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>145C</s2><s5>354000103424431440</s5></fA43><fA44><s0>0000</s0><s1>© 2002 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>12 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>02-0206085</s0></fA47><fA60><s1>P</s1><s2>C</s2></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="2"><s0>Physica. C. Superconductivity and its applications</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>The peak effect (PE) in pure, Pb and Pb + Y doped Bi2212 single crystals with different oxygen doping levels was studied by measuring M-H loops over a wide temperature range. The PE in pure Bi2212 crystals was obtained only for crystals with optimal oxygen doping and over-doping but not observed for oxygen under-doped crystals. For Pb doped Bi2212 crystals, the PE appeared at a higher field than in the pure crystals and persisted up to T<sub>c</sub>. For (Bi<sub>1.64</sub>Pb<sub>0.36</sub>)Sr<sub>2</sub>Ca<sub>1-x</sub>Y<sub>x</sub>Cu<sub>2</sub>O<sub>8+y</sub> (x = 0, 0.05, 0.11, 0.33) single crystals, results show that at low temperatures, the peak field is smaller than in solely Pb doped crystals and decreases as x increases (x > 0.1). However, the peak field at high temperature for the x = 0.05 sample is higher than for heavily Pb doped Bi2212 crystals, indicative of strong pinning due to the co-doping. The formation of Bi<sup>5+</sup> rich clusters, which cause the reduction of the c-axis lattice parameter and ρ<sub>c</sub>, is proposed to be responsible for the appearance of the PE in the undoped crystals. The co-existence of Pb<sup>4+</sup>- and Bi<sup>5+</sup>-rich clusters causes the strong PE in Pb doped Bi2212 crystals. Y<sup>3+</sup> is proposed to be an effective dopant at low doping levels for flux pinning at high temperatures. The PE for all the crystals was characterised by plotting (H<sub>max</sub> -H<sub>min</sub>)/H<sub>max</sub> vs T/T<sub>c</sub>, where H<sub>min</sub> and H<sub>max</sub> represent the fields at which the magnetisation starts to increase (H<sub>min</sub>) and reaches a maximum (H<sub>max</sub>) at the peak position. Results showed that the evolution of the peak effect with temperature in the Pb and Pb + Y doped crystals was similar to that seen in Y123.</s0></fC01><fC02 i1="01" i2="3"><s0>001B70D25H</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Effet pic</s0><s5>02</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Peak effect</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Non stoechiométrie</s0><s5>04</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Nonstoichiometry</s0><s5>04</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Hystérésis magnétique</s0><s5>06</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Magnetic hysteresis</s0><s5>06</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Dépendance température</s0><s5>07</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Temperature dependence</s0><s5>07</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Aimantation</s0><s5>08</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Magnetization</s0><s5>08</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Effet composition</s0><s5>09</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Composition effect</s0><s5>09</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Efecto composición</s0><s5>09</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Ancrage flux</s0><s5>10</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Flux pinning</s0><s5>10</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Supraconducteur haute température</s0><s5>11</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>High-Tc superconductors</s0><s5>11</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Monocristal</s0><s5>12</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Monocrystals</s0><s5>12</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Bismuth oxyde</s0><s2>NK</s2><s5>15</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>Bismuth oxides</s0><s2>NK</s2><s5>15</s5></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Calcium oxyde</s0><s2>NK</s2><s5>16</s5></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Calcium oxides</s0><s2>NK</s2><s5>16</s5></fC03><fC03 i1="12" i2="3" l="FRE"><s0>Plomb oxyde</s0><s2>NK</s2><s5>17</s5></fC03><fC03 i1="12" i2="3" l="ENG"><s0>Lead oxides</s0><s2>NK</s2><s5>17</s5></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Cuivre oxyde</s0><s2>NK</s2><s5>18</s5></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Copper oxides</s0><s2>NK</s2><s5>18</s5></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Strontium oxyde</s0><s2>NK</s2><s5>19</s5></fC03><fC03 i1="14" i2="3" l="ENG"><s0>Strontium oxides</s0><s2>NK</s2><s5>19</s5></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Yttrium oxyde</s0><s2>NK</s2><s5>20</s5></fC03><fC03 i1="15" i2="3" l="ENG"><s0>Yttrium oxides</s0><s2>NK</s2><s5>20</s5></fC03><fC03 i1="16" i2="3" l="FRE"><s0>Etude expérimentale</s0><s5>21</s5></fC03><fC03 i1="16" i2="3" l="ENG"><s0>Experimental study</s0><s5>21</s5></fC03><fC03 i1="17" i2="3" l="FRE"><s0>7425H</s0><s2>PAC</s2><s4>INC</s4><s5>56</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 composé</s0><s5>49</s5></fC07><fC07 i1="02" i2="3" l="ENG"><s0>Transition element compounds</s0><s5>49</s5></fC07><fN21><s1>119</s1></fN21><fN82><s1>PSI</s1></fN82></pA><pR><fA30 i1="01" i2="1" l="ENG"><s1>New<sup>3</sup>SC-3 International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials</s1><s2>3</s2><s3>Honolulu, Hawaii USA</s3><s4>2001-01-15</s4></fA30></pR></standard></inist><affiliations><list><country><li>Australie</li></country></list><tree><country name="Australie"><noRegion><name sortKey="Wang, X L" sort="Wang, X L" uniqKey="Wang X" first="X. L." last="Wang">X. L. Wang</name></noRegion><name sortKey="Dou, S X" sort="Dou, S X" uniqKey="Dou S" first="S. X." last="Dou">S. X. Dou</name><name sortKey="Liu, H K" sort="Liu, H K" uniqKey="Liu H" first="H. K." last="Liu">H. K. Liu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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