Early stages of the heteroepitactic growth of hematite on (0001) Al2O3by transmission electron microscopy
作者:
Lisa A. Tietz,
Scott R. Summerfelt,
Gerald R. English,
C. Barry Carter,
期刊:
Applied Physics Letters
(AIP Available online 1989)
卷期:
Volume 55,
issue 12
页码: 1202-1204
ISSN:0003-6951
年代: 1989
DOI:10.1063/1.102464
出版商: AIP
数据来源: AIP
摘要:
A new method for studying the early stages of the growth of oxide epilayers by transmission electron microscopy (TEM) is described. The technique uses well‐characterized, single‐crystal TEM foils as substrates for the deposition process. In the present study, chemical vapor deposition was used to form small islands (50–300 nm) of &agr;‐Fe2O3on (0001) oriented Al2O3thin‐foil substrates. The preferential nucleation of islands at surface steps on the alumina is clearly demonstrated. Selected area diffraction and moire´ fringe pattern analysis are used to show the epitactic nature of the growth and to study the island morphology.
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