Molecular beam epitaxy of layered Dy-Ba-Cu-O compounds

Schlom, D. G.; Eckstein, J. N.; Hellman, E. S.; Streiffer, S. K.; Harris, J. S.; Beasley, M. R.; Bravman, J. C.; Geballe, T. H.; Webb, C.; von Dessonneck, K. E.; Turner, F.
October 1988
Applied Physics Letters;10/24/1988, Vol. 53 Issue 17, p1660
Academic Journal
Heteroepitaxial Dy-Ba-Cu-O films have been grown in situ on SrTiO3 substrates using an oxygen plasma beam and elemental source beams in a modified molecular beam epitaxy machine. By periodically shuttering the Dy and Ba beams during growth, flat surfaces of layered Dy-Ba-Cu-O compounds have been obtained. Periodic oscillations in the intensity of the in situ reflection high-energy electron diffraction pattern were observed during shuttered growths. Depending on growth conditions, the as-grown layers have ranged from insulating to superconducting with onset temperatures above 60 K.


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