Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (12): 2661-2666.doi: 10.3866/PKU.WHXB201310151

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Synthesis of β-FeSe by Salt-Flux Method under Air Atmosphere

YANG Cheng-Xu1, JU Jing1, ZHAO Shi-Di2, XU Hang-Yu1, LIU Meng3, LIAO Fu-Hui1, LI Guo-Bao1, LIN Jian-Hua1   

  1. 1 State Key Laboratory of Rare Earth Materials Chemistry and Applications, Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China;
    2 Beijing Huiwen Middle School, Beijing 100061, P. R. China;
    3 College of Chemistry and Material Science, Wenzhou University, Wenzhou 325027, Zhejiang Province, P. R. China
  • Received:2013-06-18 Revised:2013-10-14 Published:2013-11-28
  • Contact: JU Jing, LI Guo-Bao, LIN Jian-Hua E-mail:jingju@pku.edu.cn;liguobao@pku.edu.cn;jhlin@pku.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Project of China (973) (2010CB833103), and National Natural Science Foundation of China (21201012).

Abstract:

β-FeSe is typically prepared under vacuum at high temperatures exceeding 800 ℃. Here we develop a new LiCl/NaCl/KCl flux method to successfully synthesize β-FeSe under air atmosphere. The synthetic procedure is simple and without evacuation pretreatment. The flux effectively decreases the synthetic temperature and protects the reactants and products from air. X-ray diffraction data and Rietveld analysis show that the product has high purity. Magnetic and electrical measurements confirm that all samples obtained show superconductivity below 8 K.

Key words: β-FeSe, Iron-based superconductor, Salt-flux method, Air atmosphere, X-ray diffraction

MSC2000: 

  • O646