Journal of University of Science and Technology of China ›› 2019, Vol. 49 ›› Issue (6): 439-444.DOI: 10.3969/j.issn.0253-2778.2019.06.002
Previous Articles Next Articles
Received:
Revised:
Online:
Published:
Contact:
About author:
Abstract: A new FeSe-based superconductor Lix(C3H10N2)yFe2Se2 (C3H10N2 refers to 1,3-diaminopropane) was successfully synthesized via the two-step method. This new material belongs to a tetragonal system and has a superconducting transition temperature (Tc) of 35 K. After annealing at 125 °C for 12 h, the crystal structure of this sample remained constant, but the Tc suddenly moved to 39 K, as confirmed by the powder X-ray diffraction and the magnetic susceptibility, respectively. Before and after annealing, the lattice constants a and b changed within 0.3 %, and the changes in c were slightly larger than 1 %. Therefore, it can be inferred that the evident change in Tc between as-synthesized and annealed samples should be attributed to a rearrangement and more homogeneous distribution of the intercalated guests.
Key words: FeSe-based superconductor, co-intercalated, annealed
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://just-cn.ustc.edu.cn/EN/10.3969/j.issn.0253-2778.2019.06.002
http://just-cn.ustc.edu.cn/EN/Y2019/V49/I6/439