SCREW DISLOCATIONS OF YBA2CU3O7-DELTA SINGLE-CRYSTAL REVEALED BY CHEMICAL ETCHING

被引：8

作者：

LIN, CT

机构：

来源：

JOURNAL OF CRYSTAL GROWTH | 1994年 / 143卷 / 1-2期

关键词：

D O I：

10.1016/0022-0248(94)90373-5

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Crystallographic defects in (001), (100)/(010) and (011) faces of YBa2Cu3O7-delta (YBCO) single crystals are revealed by chemical etching. There is clear evidence for spiral hillocks and growth steps. Screw dislocation etch pits are observed to be square pyramids with growth steps along the [100]/[010] and truncated by the [110] edges. The etching rate is anisotropic with V-a[110] > V-a[100]/[010] > V-c[001] > V-i[111]. The density of the dislocation etch pits is of the order of 10(5) cm(-2) on the (001) and 10(4) cm(-2) on the (100)/(010) surfaces.

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页码：110 / 114

页数：5

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