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大尺寸GbBa2Cu3O7-δ单晶的超导电性

SUPERCONDUCTIVITY IN GdBa2Cu3O7-δ SINGLE CRYSTAL WITH LARGE SIZE

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【作者】 方明虎; 孙敦明; 赵展春; 夏健生; 余维朝; 陈祖耀; 钱逸泰; 张其瑞;

【Author】 Fang Minghu Sun Dimming Zhao Zhanchun Xia Jiansheng Yu Weichao Chen Zuyao Qian Yitai Yhang Qirui(Department of Physics,Department of Applied Chemery,University of Science and Technology of China,Hefei)

【机构】 中国科学技术大学物理系; 中国科学技术大学应用化学系; 中国高等科学技术中心 北京;

【摘要】 本文报道,以Gd完全取代Y采用熔盐法,生长出了最大尺寸为7×3×2mm3的一系列单晶体。结构分析表明,它们均属正交结构的1-2-3相单晶,空间群为Pmmm,其中未经热处理样品的晶胞参数为α=3.88A,b=3.82A,c=11.68A。测得其超导临界温度为72K。经热处理后样品的超导电性得到显著改善,Tc=82K。

【Abstract】 In this paper, a series of single crystal sampals with maxmum size 7×3×2 mm3 have been prepared with the fluxed method by substituting Gd for Y in full. The result of structure analysis shows that they are orthorhombic 1-2-3 phase single crystals with space group pmmm The lattice parameters of the samples without any treatment are a=3.88A, b=3.82A,c=11.68A Their superconductivity has been discussed. It has been much improved after being annealed in O2.

  • 【文献出处】 低温物理学报 ,Chinese Journal of Low Temperature Physics , 编辑部邮箱 ,1988年04期
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