Growth of high Tc superconducting thin films using molecular beam epitaxy techniques

Webb, C.; Weng, S.-L.; Eckstein, J. N.; Missert, N.; Char, K.; Schlom, D. G.; Hellman, E. S.; Beasley, M. R.; Kapitulnik, A.; Harris, J. S.
October 1987
Applied Physics Letters;10/12/1987, Vol. 51 Issue 15, p1191
Academic Journal
Thin films of the high-temperature superconductor DyBa2Cu3O7-x have been grown on SrTiO3 substrates using molecular beam epitaxy techniques. Reflection high-energy electron diffraction patterns observed during deposition indicate incomplete oxidation of copper and growth of oriented metallic copper microcrystals in a matrix of amorphous barium and dysprosium oxides. After post-growth anneal the films exhibited sharp superconducting transitions with zero resistance observed as high as 89 K and critical current densities of 4.8×105 A/cm2 at 4.2 K and 3.9×104 A/cm2 at 77 K.


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