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A low temperature (1100°C) process of preparing F-doped SmFeAsO samples has been developed using SmF3 with nanometer scale as the source of fluorine. A series of the SmFeAsO1−xFx (x=0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3) samples have been prepared using the present method. Compared with previous reports, the present SmF3 is more effective to introduce F into SmFeAsO system in which a transition temperature...
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