中文摘要：

在基于铁的高度 -- 体积超导体，超过 50， K 仅仅在做电子的 1111 类型混合物被观察。这里，我们重游做电子的 SmFeAsO 多晶体做进一步的调查为在这些材料最高。介绍更多的电子搬运人和更少的水晶格子失真，我们与重电子做学习 Th 和 F codoping 效果进 Sm-O 层。几十件 Sm Th FeAsO F 样品通过稳固的州的反应方法被综合，并且这些样品被结构、抵抗、磁性的大小小心地描绘。我们发现 Th 和 F 的 codoping 清楚地提高多于 Th 或 F 超导做单人赛的样品，与直到 58.6 K 的最高的记录什么时候 x = 0.2 并且 y = 0.225。进一步的元素做与削弱的超导性在样品引起更多的杂质和格子失真。

英文摘要：

In the iron-based high-To bulk superconductors, Tc above 50 K was only observed in the electron-doped 1111-type compounds. Here we revisit the electron-doped SmFeAsO polycrystals to make a further investigation for the highest Tc in these materials. To introduce more electron carriers and less crystal lattice distortions, we study the Th and F eodoping effects into the Sm-O layers with heavy electron doping. Dozens of Sm1-xThx FeAsO1-yFy samples are synthesized through the solid state reaction method, and these samples are carefully characterized by the structural, resistive, and magnetic measurements. We find that the codoping of Th and F clearly enhances the superconducting Tc more than the Th or F single-doped samples, with the highest record Tc up to 58.6K when x = 0.2 and y=0.225. Further element doping causes more impurities and lattice distortions in the samples with a weakened superconductivity.