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Journal Articles Journal of Applied Physics Year : 2008

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

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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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Dates and versions

cea-00273568 , version 1 (15-04-2008)

Identifiers

  • HAL Id : cea-00273568 , version 1

Cite

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, 2008, 103, pp.033501. ⟨cea-00273568⟩
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