Superconductivity and the Anomalous Meissner Effect in La3CaBa3Cu7O(subscript 15.5+×) Oxide(superscript ‡)

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Title:	Superconductivity and the Anomalous Meissner Effect in La3CaBa3Cu7O(subscript 15.5+×) Oxide(superscript ‡)
Other Titles:	La3CaBa3Cu7015.5+d的異常麥思那效應與超導性
Authors:	Wang, C. M.;王啓銘;Yang, Y. F.;高惠春;Kao, H. C. I.
Contributors:	淡江大學化學學系
Keywords:	La-Ca-Ba-Cu-O Superconductor;Meissner Effect;Flux Pinning;Resistivity;Magnetic Field;Shielding Effect;Superconductivity;鑭鈣鋇銅氧超導體;電阻係數;磁場;屏蔽效應;超導性
Date:	1992-02-01
Issue Date:	2013-07-29 13:40:01 (UTC+8)
Publisher:	臺北市：中國化學學會
Abstract:	A superconducting oxide with a stoichiometry La/sub 3/CaBa/sub 3/Cu/sub 7/O/sub 15.5+x/, in which x=0.75, was prepared. It had a tetragonal triple-perovskite structure with lattice parameters a=3.879.ANG. and c=11.637.ANG.. According to resistivity measurements, a sharp superconducting transition,.DELTA.T/sub c/(10-90%)=1.5K, and T/sub c(zero)/=80K were observed. When it was measured at a small magnetic field(10-20 gauss) with field cooling, the sintered pellet showed a positive magnetic susceptibility, but the powdered sample exhibited the diamagnetism of a typical superconductor. However, no peculiar shielding effect was found in both the sintered and powdered samples.
Relation:	Journal of the Chinese Chemical Society=中國化學會會誌 39(1), pp.67-69
DOI:	10.1002/jccs.199200010
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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