压力效应晶格完整性Cu-O层电阻跳变一,引言 自Michel等发现Bi-系超导氧化物以来,对该体系所进行的高T_c及其单相性的探索一直方兴未艾. 步Maeda等在多相Bi-Sr-Ca-Cu-O体系中观察到105 K超导相之后,近来掺Pb的多相Bi-体系零电阻温度已达到110 K. 其单相性问题无论在物理和应用上都张进龙...
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Specific-heat measurements of the 107-K phase of the (Bi,Pb)-Sr-Ca-Cu-O system were made in the temperature range 80-250 K by an ac calorimetry method. A finite specific-heat jump at Tc (DeltaCp/Tc=16 mJ mol-1 K-2) was first detected, from which the electronic specific-heat ...
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37Rb 38Sr 39Y 40Zr 41Nb 42Mo 43Tc 44Ru 45Rh 46Pd 47Ag 48Cd 49In 50Sn 51Sb 52Te 53I 54Xe 55Cs 56Ba 57-71La-Lu 72Hf 73Ta 74W 75Re 76Os 77Ir 78Pt 79Au 80Hg 81Tl 82Pb 83Bi 84Po 85At 86Rn 87Fr 88Ra 89-103Ac-Lr 104Rf 105Db 106Sg 107Bh 108Hs 109Mt 11...
The single phase of the high-Tc phase (107 K) in Bi-based system has been synthesized successfully for the first time by partial substituting of Pb for Bi and combined with adding more Ca, Cu based on Bi2Sr2Ca2Cu3Oy formula. A long period of sintering at 880u00b0C is necessary to ...
CRYSTALdataSINGLESUPERCONDUCTINGphaseX-raypowderpattern.In the Bi-Sr-Ca-Cu-O superconductor system, two superconducting phases (85K and 105K) were found by Maeda et al. By substituting Pb, enhanced superconducting properties and structure stabilization in these compounds have been reported. Recently,...
crystaldatasinglesuperconductingphaseX-raypowderpattern.In the Bi-Sr-Ca-Cu-O superconductor system, two superconducting phases (85K and 105K) were found by Maeda et al. By substituting Pb, enhanced superconducting properties and structure stabilization in these compounds have been reported. Recently,...
晶体学数据粉末图Maeda等在Bi-Sr-Ca-Cu-O系统中发现了两种超导相(85K和105K). 在这些化合物中,Pb的替代有利于超导性的提高和结构的稳定性. 最近史凡等用名义组分为(Pb,Bi),Sr_2Ca_3Cu_4Oy经温度为870—880℃的长时间烧结后成功地得到了107K的超导单相物质. 本文研究仅限于对该单相物质用X射线粉末法...
一,引言 自Michel等发现Bi-系超导氧化物以来,对该体系所进行的高T_c及其单相性的探索一直方兴未艾.步Maeda等在多相Bi-Sr-Ca-Cu-O体系中观察到105 K超导相之后,近来掺Pb的多相Bi-体系零电阻温度已达到110 K.张进龙中国科学院物理研究所崔长庚中国科学院物理研究所李山林李军史凡史振华科学通报K单相超导体Bi-...