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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/14118

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/14118

Title:	Bulk 2ax2bxc Superstructure in TCNQ-treated (Bi, Pb)-2223 Cuprates
Authors:	Liu, Chia-Jyi;Wu, X. J.;Yamauchi, H.
Contributors:	物理學系
Date:	1994-10
Issue Date:	2012-09-10T06:12:14Z
Publisher:	Elsevier
Abstract:	By reaching (Bi, Pb)-2223 cuprate superconductors with TCNQ (7,7,8,8-tetracyanoquinodimethane) in a sealed and evacuated pyrex ampoule at 300°C for 14 days, we have observed a superstructure of 2a×2b×c in a bulk form according to X-ray diffraction and transmission electron microscope analyses. The origin of the 2a×2b×c superstructure could be attributed to an ordering of oxygen vacancies in the CuO2 layers and also likely in the SrO layers. Electrical conductivity of this TCNQ treated (Bi, Pb)-2223 cuprate shows a metal-like temperature dependence with high resistivity (102 ∼ 103 Ω cm), and a relatively rapid resistivity drop at ca. 11.7 K.
Relation:	Physica C: Superconductivity, 231(3-4): 367-371
Appears in Collections:	[Department of Physics] Periodical Articles

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