HIGH-RESOLUTION ELECTRON-MICROSCOPY STUDY OF THE HIGH-TC SUPERCONDUCTOR TL0.5PB0.5SR4CU2CO3O7

被引：14

作者：

HERVIEU, M

MICHEL, C

HUVE, M

MARTIN, C

MAIGNAN, A

RAVEAU, B

机构：

来源：

MICROSCOPY MICROANALYSIS MICROSTRUCTURES | 1993年 / 4卷 / 01期

关键词：

D O I：

10.1051/mmm:019930040104100

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The structure and the microstructure of the new high T(c) superconductor Tl0.5Pb0.5Sr4 Cu2CO3O7 have been studied by high resolution electron microscopy. The experimental images fit well with the calculated ones based on a structure built up from the intergrowth of a 1201-type slice [Tl0.5Pb0.5Sr2CuCO5]infinity1201 with a [Sr2CuCO3O2]infinity unit. The comparison of the calculated and experimental images with those of a 1223 structure, which exhibits similar cell parameters to those of Tl0.5Pb0.5Sr4Cu2CO3O7, Shows that the oxycarbonate exhibits a characteristic contrast for some focus values which allows to differentiate the two structures. The investigation of numerous crystals attests of the high regularity of the stacking of the layers along c. One single type of defect was observed which suggests the possible existence of a new member [Tl0.5Pb0.5Sr2CuO5] [Sr2CuCO3O2]2.

引用

页码：41 / 50

页数：10

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