期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 10, 页码 3260-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja100055k
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资金
- Chinese Academy of Sciences
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 Sm0.85Nd015FeAsO0.85F0.15 were demonstrated.
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