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Formation of a low energy grain boundary in ZnO: The structural unit concept in hexagonal symmetry materials

Abstract : ZnO thin films prepared by magnetron sputtering on c-plane sapphire may exhibit a columnar growth with an average column diameter depending on the deposition temperature. In this case two epitaxial relationships coexist and adjacent columns are rotated, one from the other, by 90° around the [0001] direction. The long range rotation between domains is in agreement with the theoretical epitaxial relationships, but the local angles oscillate between 27° and 32° due to the formation of interfaces, which settle into low energy configurations with grain boundary dislocations of a Burgers vectors and 5/7 aligned structural units for the 32.2° tilt angle.
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https://hal-cea.archives-ouvertes.fr/cea-00273568
Contributor : Chantal Brassy <>
Submitted on : Tuesday, April 15, 2008 - 4:14:35 PM
Last modification on : Friday, February 19, 2021 - 5:21:33 PM

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  • HAL Id : cea-00273568, version 1

Citation

Pierre Ruterana, Morad Abouzaid, A. Béré, Jie Chen. Formation of a low energy grain boundary in ZnO: The structural unit concept in hexagonal symmetry materials. Journal of Applied Physics, American Institute of Physics, 2008, 103, pp.033501. ⟨cea-00273568⟩

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