Lattice location and stability of implanted Cu in ZnO
نویسندگان
چکیده
The lattice location of copper in single-crystalline zinc oxide was studied by means of the emission channeling technique. Following 60-keV room-temperature implantation at a fluence of 2.3310 cm, the angular distribution of b particles emitted by the radioactive isotope Cu was measured by a position-sensitive detector. The b emission patterns give direct evidence that in the as-implanted state a large fraction of Cu atoms ~60%–70%! occupy almost ideal substitutional Zn sites with root-mean-square ~rms! displacements of 0.16–0.17 Å. However, following annealing at 600 °C and above Cu was found to be located on sites that are characterized by large rms displacements ~0.3–0.5 Å! from Zn sites.
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