Fluorine solubility and superconducting properties of Sm(O,F)BiS2 single crystals
Fluorine solubility and superconducting properties of Sm(O,F)BiS2 single crystals
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Sm(O,F)BiS2单晶的氟溶解度与超导性能
DOI：
10.1016/j.jallcom.2021.160812
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发表时间：
2021
影响因子：
6.2
通讯作者：
Tanaka Isao
中科院分区：
文献类型：
--
作者：
Kinami Koki;Hanada Yuji;Nagao Masanori;Miura Akira;Hirai Shigeto;Maruyama Yuki;Watauchi Satoshi;Tanaka Isao
用KI-KCl助熔剂生长了不同标称含F量的Sm(O，F) bis2超导单晶。在Sm(O，F) bis2单晶中，F在O位的固溶体极限约小于20 at%。Sm(O，F) bis2单晶的F浓度几乎不受标称F含量的控制。表明本征稳定相的存在。在5k左右表现出超导性。尽管F浓度和c轴晶格常数相似，但随着标称F含量的增加，零电阻率超导转变温度在小于70 at%的范围内升高。
Sm(O,F)BiS2superconducting single crystals with various nominal F contents have been grown using KI-KCl flux. The solid solution limit of F at the O-site in Sm(O,F)BiS2single crystals was approximately less than 20 at%. F concentrations of Sm(O,F)BiS2single crystals were hardly controlled by nominal F contents. It suggests the existence of intrinsic stable phase. Superconductivity was shown at around 5 K. Superconducting transition temperature with zero resistivity were increased with increasing nominal F contents within less than 70 at% in O-site, despite similar F concentration andc-axis lattice constants.