K.N. Tu
Materials Science and Engineering: A
Pinning centers in epitaxial YBa2Cu3O 7- delta films have been investigated by scanning tunneling microscopy and transport studies. An astonishing surface morphology has been found which includes a high density approximately=109 cm-2 of screw dislocations and nanometer-sized holes. The density of screw dislocations can be controlled by varying the growth conditions of the YBa 2Cu3O7- delta films, allowing correlations between critical currents and screw dislocation density to be investigated. Films with higher screw dislocation densities are observed to have higher critical current densities and a slower drop of Jc(H).
K.N. Tu
Materials Science and Engineering: A
Min Yang, Jeremy Schaub, et al.
Technical Digest-International Electron Devices Meeting
S. Cohen, T.O. Sedgwick, et al.
MRS Proceedings 1983
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters