Growth of (NaxKy)FezSe2 crystals by chlorides flux at low temperatures

Publication date: 1 November 2014
Source:Journal of Crystal Growth, Volume 405
Author(s): Gang Wang , Tianping Ying , Yaobo Huang , Shifeng Jin , Lei Yan , Hong Ding , Xiaolong Chen
(Na x K y )Fe z Se2 crystals are prepared by Na, Fe, and Se as starting materials in NaCl/KCl flux at low temperatures~720°C. It is found that K is more preferred than Na to enter in between FeSe layers and forms the phase. Thus-obtained crystals contain more superconducting phase in volume fraction and exhibit new features in transport property. Our results provide a promising new synthetic route for preparing quality crystals of iron selenide superconductors.