Journal
EPL
Volume 83, Issue 6, Pages -Publisher
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/83/67006
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Funding
- National Basic Research Program of China [2006CB601003, 2007CB925001]
- Ministry of Education of China [IRT0754]
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We report a new strategy to induce superconductivity in iron-based oxyarsenide. Instead of F- substitution for O2-, we employed Th4+ doping in GdFeAsO with the consideration of lattice match between Gd2O2 layers and Fe2As2 ones. As a result, superconductivity with T-c(onset) as high as 56 K was realized in a Gd0.8Th0.2FeAsO polycrystalline sample. This T-c value is among the highest ever discovered in the iron-based oxypnictides. Copyright (C) EPLA, 2008
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