期刊
SOLID STATE COMMUNICATIONS
卷 148, 期 3-4, 页码 168-170出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2008.07.032
关键词
Superconductors; High-T-C Superconductors; Electronic transport
资金
- Natural Science Foundation of China (NSFC) [50571111, 10734120]
- 973 program of China [2006CB601001, 2007CB925002]
- EC [COMEPHS TTC]
Here we report the enhanced superconductivity in the LaFeAsO1-xFx system prepared by high pressure synthesis. The highest onset superconducting transition temperature (T-C) in this La-based system is 41.0 K with the nominal composition of LaFeAsO1-xFx (x = 0.6), which is higher than that reported previously by ambient pressure synthesis. The increase of T-C can be attributed to further shrinkage of the crystal lattice that causes stronger chemical pressure on the Fe-As plane, which is induced by the increased F-doping level under the high pressure synthesis. (C) 2008 Elsevier Ltd. All rights reserved.
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