Origin of imperfections in <100> SrLaAlO4 crystals

被引：4

作者：

Doerschel, J ^{[1
]}

Hahnert, I ^{[1
]}

Uecker, R ^{[1
]}

机构：

[1] HUMBOLDT UNIV BERLIN, INST PHYS, D-10115 BERLIN, GERMANY

来源：

ACTA PHYSICA POLONICA A | 1997年 / 92卷 / 01期

关键词：

D O I：

10.12693/APhysPolA.92.157

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In Czochralski-grown SrLaAlO4 crystals with (100) orientation, (001) planar faults extending through the entire crystal boule can frequently be observed. Chemical etching and transmission electron microscopy including energy dispersive X-ray spectroscopy were used to characterise their nucleation sites, these being located in the upper part of the crystal cone. Three serious sources were found: (1) lateral (001) facets, (2) grown-in defects in the seed, and (3) small particles of a second phase in the interior of the cone. These particles were identified as trigonal and cubic form of lanthanum oxide with a different Sr content.

引用

页码：157 / 162

页数：6

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