Journal
JOURNAL OF APPLIED PHYSICS
Volume 110, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3665204
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Funding
- MICINN, Spain [TEC2008-04718, FIS2009-12964-C05-04, CSD2008-00023]
- BMWi/AiF, Germany [16595 BG]
- FCT, Portugal [SFRH/BPD/74095/2010, PTDC/CTM/100756/2008]
- European Community [227012]
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The effect of the substrate temperature on the sublattice ordering in ZnO layers grown by reactive pulsed magnetron sputtering on sapphire has been investigated by different techniques. The improvement of the crystal quality and heteroepitaxial growth at relatively low temperatures (550 degrees C) is verified by x-ray diffraction, high-resolution transmission electron microscopy, Rutherford backscattering spectrometry in channeling mode (RBS/C), and Raman spectroscopy. Sublattice-resolved analysis by resonant RBS/C and Raman spectroscopy reveals that the progressive transition to the single crystal phase is accomplished in a faster way for Zn-than for O-sublattice. This behavior is attributed to the preferential annealing of defects in the Zn sublattice at low temperatures when compared to those of the O sublattice. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665204]
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