WANG Yong JIA Haiqiang WANG Wenchong LIU Cuixiu CHEN Xiangming MAI Zhenhong. Microstructure of GaAs/AlAs/GaAs with and without oxidation[J]. Nuclear techniques, 2002, (10): 775-778.
WANG Yong JIA Haiqiang WANG Wenchong LIU Cuixiu CHEN Xiangming MAI Zhenhong. Microstructure of GaAs/AlAs/GaAs with and without oxidation[J]. Nuclear techniques, 2002, (10): 775-778.DOI:
The Changes of compositions and microstructures of GaAs/AlAS/GaAs trilayers before and after oxidation were investigated. GaAs/Al 2O 3/GaAs thin film was obtained from GaAs/AlAs/GaAs by lateral oxidation and its microstructures were investigated by use of X-ray small angle reflectivity and high angle diffraction. The results show that before oxidation there exists an even transition layer with the thickness of 110 between the AlAs layer and the upper GaAs layer. The AlAs layer was separated into two layers
one is of 40 thickness and the other 1050. The average atomic density of the thin AlAs layer is less than that of the thick AlAs layer. After lateral oxidation
AlAs was oxidized into Al 2O 3
and the thickness and roughness of the transition layer metioned above decrease.