Low-Temperature Rapid Synthesis and Superconductivity of Fe-Based Oxypnictide Superconductors

Fe-based oxypnictide superconductors were successfully synthesized at lower reaction temperatures and with shorter reaction times made possible by starting with less stable compounds, which provide a larger driving force for reactions. Using ball-milled powders of intermediate compounds, phase-pure...

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Published inJournal of the American Chemical Society Vol. 132; no. 10; pp. 3260 - 3261
Main Authors Fang, Ai-Hua, Huang, Fu-Qiang, Xie, Xiao-Ming, Jiang, Mian-Heng
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 17.03.2010
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Summary:Fe-based oxypnictide superconductors were successfully synthesized at lower reaction temperatures and with shorter reaction times made possible by starting with less stable compounds, which provide a larger driving force for reactions. Using ball-milled powders of intermediate compounds, phase-pure superconductors with T c above 50 K were synthesized at 1173 K in 20 min. This method is particularly advantageous for retaining F, a volatile dopant that enhances superconductivity. Bulk superconductivity and high upper critical fields up to 392 T in Sm0.85Nd0.15FeAsO0.85F0.15 were demonstrated.
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ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/ja100055k