Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (10): 877-882.doi: 10.3866/PKU.WHXB19991004

• ARTICLE • Previous Articles     Next Articles

Structure and Superconductivity of 1223 Phase in F-doped Hg-based Superconductor

Gao Xiao-Hui, Li Jie, Xiao Shen-Xiu, Chen Tian-Lang   

  1. Department of Chenistry,Central South University of Techology,Changsha 410083|Department of Chemistry,Sichuan United University,Chengdu 610064
  • Received:1998-11-05 Revised:1999-01-28 Published:1999-10-15
  • Contact: Gao Xiao-Hui


1223 Hg-based Hg-Ba-Ca-Cu-(O,F) superconductor was prepared. It was proved that F entered 1223 superconductive phase and located at O(3) lattice site. The critical temperature T c of the samples doped with fluoride but without annealling is as high as 133.8 K, which is ~22 K higher than that of Hg Ba Ca Cu O standard samples. With the substitution of F with O, the carrier′s concentration in the superconductor is nearly close to the optimum value, which leads T c of F-doped samples increasing greatly.

Key words: 1223 Hg-based supercondutor, Quasi-perovskite structure, Superconductivity, Doping-fluoride