Atomic structure of [0001]-tilt grain boundaries in ZnO

A high-resolution TEM study of fiber-textured thin films

Fumiyasu Oba, Hiromichi Ohta, Yukio Sato, Hideo Hosono, Takahisa Yamamoto, Yuichi Ikuhara

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The atomic structure of [0001]-tilt grain boundaries in ZnO was investigated using high-resolution transmission electron microscopy (HRTEM) and atomistic calculations. HRTEM observation was conducted for [0001] fiber-textured ZnO thin films grown on quartz-glass substrates by the pulsed-laser deposition. The [0001]-tilt boundaries observed in the films can be classified into three types: low-angle boundaries composed of irregular dislocation arrays, boundaries with {1010} facet structures, and near-low ∑ boundaries represented by symmetric periodicity units. The atomic structure of the boundaries is discussed with a focus on a ∑=7 boundary in conjunction with atomistic calculations and HRTEM image simulations. The ∑=7 boundary consists of multiple structural units that are very similar to the core structures of edge dislocations. Straight or zigzag arrangements of the dislocationlike structural units constitute other high-angle boundaries with symmetric and {1010} facet structures as well. It is suggested that [0001]-tilt boundaries in ZnO are generally described as an array of the dislocationlike units.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number12
DOIs
Publication statusPublished - Sep 1 2004
Externally publishedYes

Fingerprint

Crystal atomic structure
High resolution transmission electron microscopy
atomic structure
Grain boundaries
grain boundaries
Transmission electron microscopy
Thin films
transmission electron microscopy
fibers
Fibers
high resolution
thin films
Edge dislocations
Quartz
Pulsed laser deposition
Glass
flat surfaces
Substrates
edge dislocations
pulsed laser deposition

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Atomic structure of [0001]-tilt grain boundaries in ZnO : A high-resolution TEM study of fiber-textured thin films. / Oba, Fumiyasu; Ohta, Hiromichi; Sato, Yukio; Hosono, Hideo; Yamamoto, Takahisa; Ikuhara, Yuichi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 12, 01.09.2004.

Research output: Contribution to journalArticle

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