Identification of pinning centres in high Tc superconducting thin films by AC susceptibility
We compare vortex pinning properties of high temperature superconductors (HTS) thin films and correlate these to microstructure to identify pinning centres. We have grown YBa2Cu3O7−δ (YBCO), YBCO/PrBa2Cu2.8Ga0.2O7−δ (YBCO/PBCGO), NdBa2Cu3O7−δ (NBCO) thin films and superlattices on (100) SrTiO3. We s...
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| Veröffentlicht in: | Physica status solidi. C 2004-05, Vol.1 (7), p.1935-1939 |
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| creator | Crété, D.-G. Bernard, R. Pommereau, J.-H. Gadois, C. Berger, S. Briatico, J. Contour, J.-P. Durand, O. Maurice, J.-L. Grollier, J. Bouzehouane, K. |
| description | We compare vortex pinning properties of high temperature superconductors (HTS) thin films and correlate these to microstructure to identify pinning centres. We have grown YBa2Cu3O7−δ (YBCO), YBCO/PrBa2Cu2.8Ga0.2O7−δ (YBCO/PBCGO), NdBa2Cu3O7−δ (NBCO) thin films and superlattices on (100) SrTiO3. We show that pinning by intersections of twin boundaries usually dominates except for strained superlattices [1] and for the NBCO thin films presenting only one [1, 1, 0] twin variant (the [1$ \bar 1 $0] being completely eliminated), thereby drastically reducing the density of twin boundary intersections (TBI). As expected, AC susceptibility measurements show low pinning properties of these samples. Using High Resolution AC susceptibility, we have discriminated several mechanisms contributing to vortex pinning in a given sample. Indeed, when we eliminated TBI pinning in NBCO thin films, several peaks were observed in χ(T) curve, each one presumably associated with a specific pinning mechanism. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| doi_str_mv | 10.1002/pssc.200304467 |
| format | Article |
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We have grown YBa2Cu3O7−δ (YBCO), YBCO/PrBa2Cu2.8Ga0.2O7−δ (YBCO/PBCGO), NdBa2Cu3O7−δ (NBCO) thin films and superlattices on (100) SrTiO3. We show that pinning by intersections of twin boundaries usually dominates except for strained superlattices [1] and for the NBCO thin films presenting only one [1, 1, 0] twin variant (the [1$ \bar 1 $0] being completely eliminated), thereby drastically reducing the density of twin boundary intersections (TBI). As expected, AC susceptibility measurements show low pinning properties of these samples. Using High Resolution AC susceptibility, we have discriminated several mechanisms contributing to vortex pinning in a given sample. Indeed, when we eliminated TBI pinning in NBCO thin films, several peaks were observed in χ(T) curve, each one presumably associated with a specific pinning mechanism. (© 2004 WILEY‐VCH Verlag GmbH & Co. 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C</title><addtitle>phys. stat. sol. (c)</addtitle><description>We compare vortex pinning properties of high temperature superconductors (HTS) thin films and correlate these to microstructure to identify pinning centres. We have grown YBa2Cu3O7−δ (YBCO), YBCO/PrBa2Cu2.8Ga0.2O7−δ (YBCO/PBCGO), NdBa2Cu3O7−δ (NBCO) thin films and superlattices on (100) SrTiO3. We show that pinning by intersections of twin boundaries usually dominates except for strained superlattices [1] and for the NBCO thin films presenting only one [1, 1, 0] twin variant (the [1$ \bar 1 $0] being completely eliminated), thereby drastically reducing the density of twin boundary intersections (TBI). As expected, AC susceptibility measurements show low pinning properties of these samples. Using High Resolution AC susceptibility, we have discriminated several mechanisms contributing to vortex pinning in a given sample. Indeed, when we eliminated TBI pinning in NBCO thin films, several peaks were observed in χ(T) curve, each one presumably associated with a specific pinning mechanism. (© 2004 WILEY‐VCH Verlag GmbH & Co. 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C</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Crété, D.-G.</au><au>Bernard, R.</au><au>Pommereau, J.-H.</au><au>Gadois, C.</au><au>Berger, S.</au><au>Briatico, J.</au><au>Contour, J.-P.</au><au>Durand, O.</au><au>Maurice, J.-L.</au><au>Grollier, J.</au><au>Bouzehouane, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification of pinning centres in high Tc superconducting thin films by AC susceptibility</atitle><jtitle>Physica status solidi. C</jtitle><addtitle>phys. stat. sol. (c)</addtitle><date>2004-05</date><risdate>2004</risdate><volume>1</volume><issue>7</issue><spage>1935</spage><epage>1939</epage><pages>1935-1939</pages><issn>1610-1634</issn><eissn>1610-1642</eissn><abstract>We compare vortex pinning properties of high temperature superconductors (HTS) thin films and correlate these to microstructure to identify pinning centres. We have grown YBa2Cu3O7−δ (YBCO), YBCO/PrBa2Cu2.8Ga0.2O7−δ (YBCO/PBCGO), NdBa2Cu3O7−δ (NBCO) thin films and superlattices on (100) SrTiO3. We show that pinning by intersections of twin boundaries usually dominates except for strained superlattices [1] and for the NBCO thin films presenting only one [1, 1, 0] twin variant (the [1$ \bar 1 $0] being completely eliminated), thereby drastically reducing the density of twin boundary intersections (TBI). As expected, AC susceptibility measurements show low pinning properties of these samples. Using High Resolution AC susceptibility, we have discriminated several mechanisms contributing to vortex pinning in a given sample. Indeed, when we eliminated TBI pinning in NBCO thin films, several peaks were observed in χ(T) curve, each one presumably associated with a specific pinning mechanism. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</abstract><cop>Berlin</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/pssc.200304467</doi><tpages>5</tpages></addata></record> |
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| subjects | 74.25.Qt 74.62.Bf 74.78.Bz 74.78.Fk |
| title | Identification of pinning centres in high Tc superconducting thin films by AC susceptibility |
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