| Nanoscale strain-induced pair suppression as a vortex-pinning mechanism in high-temperature superconductors. | |
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MedLine Citation:
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PMID: 22327747 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Boosting large-scale superconductor applications require nanostructured conductors with artificial pinning centres immobilizing quantized vortices at high temperature and magnetic fields. Here we demonstrate a highly effective mechanism of artificial pinning centres in solution-derived high-temperature superconductor nanocomposites through generation of nanostrained regions where Cooper pair formation is suppressed. The nanostrained regions identified from transmission electron microscopy devise a very high concentration of partial dislocations associated with intergrowths generated between the randomly oriented nanodots and the epitaxial YBa(2)Cu(3)O(7) matrix. Consequently, an outstanding vortex-pinning enhancement correlated to the nanostrain is demonstrated for four types of randomly oriented nanodot, and a unique evolution towards an isotropic vortex-pinning behaviour, even in the effective anisotropy, is achieved as the nanostrain turns isotropic. We suggest a new vortex-pinning mechanism based on the bond-contraction pairing model, where pair formation is quenched under tensile strain, forming new and effective core-pinning regions. |
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Authors:
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A Llordés; A Palau; J Gázquez; M Coll; R Vlad; A Pomar; J Arbiol; R Guzmán; S Ye; V Rouco; F Sandiumenge; S Ricart; T Puig; M Varela; D Chateigner; J Vanacken; J Gutiérrez; V Moshchalkov; G Deutscher; C Magen; X Obradors |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-12 |
Journal Detail:
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Title: Nature materials Volume: - ISSN: 1476-1122 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101155473 Medline TA: Nat Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, 08193 Bellaterra, Catalonia, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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