Abstract
We have developed the simple method enables Zn 1− x Cr x O crystals to form with variation in Cr composition ratio. Energy-dispersion X-Ray spectroscopy indicated that the pre-deposited Au catalyst promoted the growth of Zn 1− x Cr x O crystals on a sapphire (0 0 0 1) substrate. Whiskers and particles coexisted as the Zn 1− x Cr x O crystals up to 7% of Cr composition, in contrast, those particles grew above 7%. It has been found that the lattice constant of Zn 1− x Cr x O decreased as the Cr composition up to 7%. A Cr content of 7% in the sublimation source corresponds to the Cr composition of 9.2% in Zn 1− x Cr x O crystal. This research has successfully enable Cr doping beyond solubility limit in Zn 1− x Cr x O crystals.
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