通过低温慢冷烧结制备无α-FeAs的SmFeAsO1-xFx
超导电性
2015-06-15 v2
摘要
我们采用低温慢冷烧结方法获得了无非晶态FeAs的SmFeAsO1-xFx。SmFeAsO1-xFx在980°C烧结40小时，然后缓慢冷却至600°C。低温烧结抑制了非晶态FeAs的形成，而慢冷过程将大量氟引入SmFeAsO1-xFx。该样品的超导电性出现在57.8 K，超导体积分数达到96%。为了研究冷却过程中氟浓度的变化，我们在950°C、900°C、850°C、800°C、750°C和700°C对样品进行水淬。发现氟不仅在最高加热温度下被替代，而且在冷却过程中也被替代。低温慢冷烧结对于获得具有高氟浓度的均匀SmFeAsO1-xFx非常有效。
引用
@article{arxiv.1303.1309,
title = {{\alpha}-FeAs-free SmFeAsO1-xFx by low temperature sintering with slow cooling},
author = {Masaya Fujioka and Saleem James Denholme and Toshinori Ozaki and Hiroyuki Okazaki and Keita Deguchi and Satoshi Demura and Hiroshi Hara and Tohru Watanabe and Hiroyuki Takeya and Takahide Yamaguchi and Hiroaki Kumakura and Yoshihiko Takano},
journal= {arXiv preprint arXiv:1303.1309},
year = {2015}
}
备注
17 pages, 7 figures