New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr2(Nd, Ce)2Cu2Oz and Their Superconductivity

Chin. Phys. Lett.

1993, Vol. 10

Issue (1): 49-52 DOI:

Original Articles

New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr₂(Nd, Ce)₂Cu₂O_z and Their Superconductivity

CHEN Zuyao*;TANG Yongqiu**;Z. Z. Sheng;Y . F. Li;D. O. Pederson;

*Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026 **Analysis and Research Center, East China Institute of Chemical Technology, Shanghai 200237 Department of Physics, University of Arkansas, Fayetteville, A R 72701, USA

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CHEN Zuyao, TANG Yongqiu, Z. Z. Sheng et al 1993 Chin. Phys. Lett. 10 49-52

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Abstract A new series of 1222-type thallium-indium layered cuprate compounds (Tl, In)Sr₂(Nd, Ce)₂Cu₂O_z have been successfully synthesized in the pure or nearly pure form and identified by powder x-ray diffraction analyses. The structure of the compounds is directly related to that of Nb-1222 NbSr₂(Nd, Ce)₂Cu₂O_z, with a tetragonal body-center lattice. The lattice parameters are a=3.85Å, c=29.56Å for (Tl_0.7ln_0.3)Srz(Nd_0.5Ce_0.5)₂Cu₂O_z, and a=3.85Å, c=29.28Å for lnSr₂(Nd_0.75Ce_0.25)₂Cu₂O_z. Resistance measurements showed that (T1_1-xIn_x)Sr₂(Nd_0.75Ce_0.25)₂Cu₂O_z(x ≤ 0.8) are superconducting with Tc(onset)=30-40K .

Keywords: 74.70.-b 74.70.Vy

Published: 01 January 1993

PACS:	74.70.-b	(Superconducting materials other than cuprates)
	74.70.Vy

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1993/V10/I1/049

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	CHEN Zuyao
	TANG Yongqiu
	Z. Z. Sheng
	Y . F. Li
	D. O. Pederson

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