Influence of fluorine on the properties of Nd1.85Ce0.15CuO4-delta n-type superconductor

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	Influence of fluorine on the properties of Nd1.85Ce0.15CuO4-delta n-type superconductor
	C. Wang; J. K. Liang; X. L. Chen; J. R. Min; G. H. Rao; C. Dong; G. C. Che; S. L. Jia
	1996
发表期刊	Physica C-Superconductivity and Its Applications
ISSN	0921-4534
卷号	260 期号:1-2 页码:64-70
摘要	The fluorine-doped n-type superconductors Nd1.85Ce0.15CuO4-x-yFy (nominal composition) are synthesized with CuF2 as one of the reactants. Especially, it is found that the superconductivity of Nd1.85Ce0.15CuO4-delta is improved with T-c(on) = 27 K, T-c(0) = 15.5 K when CuF2 is taken as a source of atmosphere; the temperature dependence of the resistance exhibits a metallic conducting behavior above T-c. Magnetization measurements showed 30% of superconducting phase fractions by means of SQUID magnetometry, which was a better result of superconductivity in (Nd,Ce)-Cu-O bulk samples than when prepared under ambient pressure. Compared with the cast of F undoping, F doping not only induces a transition from semiconductivity to metallic conductivity and decreases the normal-state resistivity, but also increases the T-c(on) and T-c(0), and decreases the transition width Delta T-c. In particular, the superconductivity of the samples is sensitive to the form of the dopant source and sintering procedures, Especially, the Nd1.85Ce0.15CuO3.6F0.4 sintered only in air also exhibits superconductivity with T-c(on) = 19.5 K, but does not reach zero resistance, which has not been reported before. X-ray diffraction experiments indicate that fluorine atoms do enter the superconducting phase lattice.
部门归属	acad sinica,int ctr mat phys,shenyang 110015,peoples r china. acad sinica,inst phys,natl lab supercond,beijing 100080,peoples r china.;wang, c (reprint author), acad sinica,inst phys,pob 603,beijing 100080,peoples r china
关键词	Doped Nd2cuo4 Crystals Growth
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38419
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Wang,J. K. Liang,X. L. Chen,et al. Influence of fluorine on the properties of Nd1.85Ce0.15CuO4-delta n-type superconductor[J]. Physica C-Superconductivity and Its Applications,1996,260(1-2):64-70.
APA	C. Wang.,J. K. Liang.,X. L. Chen.,J. R. Min.,G. H. Rao.,...&S. L. Jia.(1996).Influence of fluorine on the properties of Nd1.85Ce0.15CuO4-delta n-type superconductor.Physica C-Superconductivity and Its Applications,260(1-2),64-70.
MLA	C. Wang,et al."Influence of fluorine on the properties of Nd1.85Ce0.15CuO4-delta n-type superconductor".Physica C-Superconductivity and Its Applications 260.1-2(1996):64-70.