Abstract
We have studied the effects of the kinetic energy of mass-separated O+ beams on the growth of CuO thin films deposited on unheated MgO(001) and at 510 °C, in energy ranging from 10 to 200 eV by x-ray photoemission spectroscopy, x-ray diffraction, reflection high-energy electron diffraction, and scanning electron microscopy. The films deposited at 510 °C show a full width at the half maximum (FWHM) of 0.06°for the rocking curve through the (111) peak, regardless of the kinetic energy of oxygen ions. CuO has been epitaxially grown on MgO(001) without heating it in a vacuum of 4 × 10−7 Pa. The x-ray diffraction intensity of the CuO(111) increases with an increase in the kinetic energy of O+, and its FWHM approaches that of the CuO film grown at 510 °C. The surface morphology is improved for the films deposited on unheated substrates.
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Kita, R., Kawaguchi, K., Hase, T. et al. Effects of oxygen ion energy on the growth of CuO films by molecular beam epitaxy using mass-separated low-energy O+ beams. Journal of Materials Research 9, 1280–1283 (1994). https://doi.org/10.1557/JMR.1994.1280
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DOI: https://doi.org/10.1557/JMR.1994.1280