MICROSTRUCTURE OF MELT-TEXTURED YBA2CU3O7-DELTA

被引：9
|
作者：
MULLER, D
ULLRICH, M
HEINEMANN, K
FREYHARDT, HC
机构：
[1] Institut für Metallphysik, Universität Göttingen, 37073Göttingen
来源：
PHYSICA C | 1994年 / 220卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(94)90885-0
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructure of stoichiometric Bridgman melt-textured YBa2Cu3O7-delta was investigated by transmission electron microscopy and electron diffraction. Crystal defects like twins, dislocations, small second-phase inclusions and lattice distortions are observed. The density of the dislocations is extremely high (1.7X10(10)/cm(2)) and the average diameter of the second-phase inclusions (BaCuO2) of 35 nm is rather small. The density of the inclusions amounts to 6X10(19)/m(3). The formation of the microstructural defects and their influence on flux pinning is discussed. It is supposed that the observed lattice distortions are possible defects which cause the fish-tail effect.
引用
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页码：67 / 73
页数：7
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