Flat epitaxial diamond/Ir(0 0 1) interface visualized by high resolution transmission electron microscopy

  • Hörmann F
  • Peng H
  • Bauer T
 et al. 
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High resolution transmission electron microscopy (HRTEM) was used to study the interface structure of epitaxial diamond crystallites deposited on Ir(0 0 1)/SrTiO3(0 0 1). The selected samples did not show any significant surface roughening of the Ir film after the nucleation step. The diamond crystallites formed a flat, sharp, and crystalline interface with the Ir film without any intermediate layer. The epitaxial relationship is diamond (0 0 1)[1 0 0] ∥ Ir(0 0 1)[1 0 0] and the misorientation of the diamond crystallites directly grown on the iridium is smaller than 1°. Homogeneous amorphous interlayers often observed in thick samples are attributed to delamination during cool-down induced by the large thermal misfit between diamond and the substrate. The Ir(001)/SrTiO3(0 0 1) interface proved to be stable in the harsh CVD plasma environment showing an excellent epitaxy without a measurable misorientation. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Chemical vapor deposition
  • Diamond
  • Electron microscopy
  • Epitaxy
  • Interface states
  • Iridium

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  • F. Hörmann

  • H. Y. Peng

  • Th Bauer

  • Q. Li

  • M. Schreck

  • Y. Lifshitz

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