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Optimal growth and thermal stability of crystalline Be0.25Zn0.75O alloy films on Al2O3 (0001)
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Park, Dae-Sung, Krupski, A., Sánchez, Ana M., Choi, Chel-Jong, Yi, Min-Su, Lee, Hyun-Hwi, McMitchell, Sean R. C. and McConville, C. F. (Chris F.) (2014) Optimal growth and thermal stability of crystalline Be0.25Zn0.75O alloy films on Al2O3 (0001). Applied Physics Letters, Volume 104 (Number 14). Article number 141902. doi:10.1063/1.4870533 ISSN 0003-6951.
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Official URL: http://dx.doi.org/10.1063/1.4870533
Abstract
The influence of growth temperature on the synthesis of Be x Zn 1− x O alloy films, grown on highly-mismatched Al2O3(0001) substrates, was studied by synchrotron x-ray scattering, high-resolution transmission electron microscopy and photoluminescence measurements. A single-phase Be x Zn 1− x O alloy with a Be concentration of x = 0.25, was obtained at the growth temperature, T g = 400 °C, and verified by high-resolution transmission electron microscopy. It was found that high-temperature growth, Tg≥600 °C , caused phase separation, resulting in a random distribution of intermixed alloy phases. The inhomogeneity and structural fluctuations observed in the Be x Zn 1− x O films grown at high temperatures are attributed to a variation in Be composition and mosaic distribution via atomic displacement and strain relaxation.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | Applied Physics Letters | ||||||||
Publisher: | American Institute of Physics | ||||||||
ISSN: | 0003-6951 | ||||||||
Official Date: | 7 April 2014 | ||||||||
Dates: |
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Volume: | Volume 104 | ||||||||
Number: | Number 14 | ||||||||
Article Number: | Article number 141902 | ||||||||
DOI: | 10.1063/1.4870533 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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