Journal
PHYSICAL REVIEW B
Volume 71, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.075304
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Undoped and Al-doped ZnO films with dopant concentrations of nominally 1% and 10% and a thickness of 100 ran have been grown on SrTiO3(001) by pulsed laser deposition at substrate temperatures between 650 degrees C and 820 degrees C. The epitaxial conditions were examined with high pressure in-situ reflection high energy electron diffraction (RHEED) and ex-situ x-ray diffraction (XRD) measurements in different geometries. The films are highly (1120)-oriented with a lattice mismatch between the SrTiO3[110] direction and the c-axis of about 3%. Atomic force microscopy (AFM) revealed smooth surfaces with a roughness of d(rms) < 5 nm and different sized islands.
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