Synthesis and superconductivity of a new 1222-type T1-based layered cuprate (T1, Nb) Sr2(Nd,Ce)2Cu2O z |
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| Authors: | Z. Y. Chen Y. Q. Tang Y. F. Li D. O. Pederson Z. Z. Sheng |
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| Affiliation: | (1) Department of Physics, University of Arkansas, 72701 Fayetteville, AR, USA;(2) Present address: Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026 Anhui, People's Republic of China;(3) Present address: Analysis and Research Center, East China Institute of Chemical Technology, 200237 Shanghai, People's Repbulic of China |
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| Abstract: | Synthesis and superconductivity of a new 1222-type layered cuprate (Tl1–xNbx) Sr2(Nd1–yCey)2Cu2Oz have been studied. The structure of this cuprate is directly related to that of Nb-1222 NbSr2(Nd, Ce)2Cu2Oz with tetragonal body-center lattice. Partial substitution of Tl for Nb in Nb-1222 phase improves its superconductivity. (Tl1–xNbx) Sr2(Nd0.75Ce0.25)2Cu2Oz samples prepared by the typical procedure exhibit superconductivity withTc of 30–40 K. Effects of Tl and Nb on superconductivity of this cuprate are briefly discussed. |
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