Origin of Imperfections in ⟨100⟩ SrLaAlO_{4} Crystals

• Authors: J. Doerschel , I. Hähnert , R. Uecker
• Languages of publication: EN

Abstracts

EN

In Czochralski-grown SrLaAlO_{4} 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.

Keywords

EN

81.65.Cf; 81.30.Mn; 61.72.Ff

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 1
• Pages: 157-162

Dates

published

1997-07

Contributors

author

J. Doerschel

• Institut für Kristallzüchtung im Forschungsverbund Berlin e.V., 12489 Berlin, Germany

author

I. Hähnert

• Institut für Physik, Humboldt-Universität zu Berlin, 10115 Berlin, Germany

author

R. Uecker

• Institut für Kristallzüchtung im Forschungsverbund Berlin e.V., 12489 Berlin, Germany