Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
We have observed spontaneous magnetic moments with random signs in c-axis-oriented thin films of the high-Tc cuprate superconductor YBa2Cu3O7-δ, imaged with a scanning superconducting quantum interference device microscope. These moments arise when the samples become superconducting, and appear to be associated with nonferromagnefic defects in the films. In contrast with granular high-Tc samples, which also show spontaneous moments with random signs, the present samples shield diamagnetically.
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
John G. Long, Peter C. Searson, et al.
JES
Kenneth R. Carter, Robert D. Miller, et al.
Macromolecules
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989