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Citation: Gao Xiao-Hui, Li Jie, Xiao Shen-Xiu, Chen Tian-Lang. Structure and Superconductivity of 1223 Phase in F-doped Hg-based Superconductor[J]. Acta Physico-Chimica Sinica, ;1999, 15(10): 877-882. doi: 10.3866/PKU.WHXB19991004 shu

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

1.
Department of Chenistry,Central South University of Techology,Changsha 410083

Received Date: 5 November 1998
Available Online: 15 October 1999

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.
- 1223 Hg-based supercondutor,
- Quasi-perovskite structure,
- Superconductivity,
- Doping-fluoride
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