On structure and stability of (Hg, Mo)-1212 superconductors based on SAED and EDS analysis期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

On structure and stability of (Hg, Mo)-1212 superconductors based on SAED and EDS analysis

Authors:	L. Yang K. B. Tang C. G. Fan Y. H. Zhang

Affiliation:	(1) Structure Research Laboratory, Academia Sinica, University of Science and Technology of China, Hefei, 230026 Anhui, P.R. China;(2) Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026 Anhui, P.R. China;(3) World Laboratory, CCAST, 100080 Beijing, P.R. China

Abstract:	A superconductor with nominal composition Hg_0.8Mo_0.2Sr₂Y_0.5Ca_0.5Cu₆₊ withT_c up to 96 K has been isolated and carefully examined by electron diffraction and X-ray energy dispersive spectrum analyses. Its structure can be attributed to space groupP4/mmm and lattice constantsa=3.82 å andc=11.91 å. Inhomogeneous distribution of the cations was observed, which is considered to be the key to the broadening ofT_c in theR-T curve. The effect of humid atmosphere on the stability of the sample has also been investigated.

Keywords:	Hg_0.8Mo_0.2Sr₂Y_0.5Ca_0.5Cu₆₊/content/n0881256264315n8/xxlarge948.gif" alt=" delta" align=" BASELINE" BORDER=" 0" > electron diffraction X-ray energy dispersive spectrum
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