期刊
SCIENCE CHINA-MATERIALS
卷 61, 期 7, 页码 977-984出版社
SCIENCE PRESS
DOI: 10.1007/s40843-017-9230-2
关键词
ethylenediamine; FeSe; intercalation; superconductivity
资金
- National Natural Science Foundation of China [21671182]
A new FeSe-based superconductor (C2H8N2)(x) FeSe with ethylenediamine intercalated into FeSe was successfully synthesized by the solvothermal method, which is the first superconducting instance by metal-free organic molecule intercalation. Elemental analysis and TG-IR-GC/MS data reveal that the ethylenediamine molecules in the interlayer space are separate and intact. The X-ray diffraction (XRD) pattern indicates that the intercalation compound is an orthorhombic lattice rather than a tetragonal lattice applying to almost all the previous FeSe-based superconductors at room temperature. The magnetism measurements display a sharp superconducting transition at similar to 10 K which is assigned to (C2H8N2) xFeSe, and a tiny drop in susceptibility at similar to 30 K.
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