| Autor: |
Cooke, D. W., Jahan, M. S., Smith, J. L., Maez, M. A., Hults, W. L., Raistrick, I. D., Peterson, D. E., O’Rourke, J. A., Richardson, S. A., Doss, J. D., Gray, E. R., Rusnak, B., Lawrence, G. P., Fortgang, C. |
| Předmět: |
|
| Zdroj: |
Applied Physics Letters; 3/6/1989, Vol. 54 Issue 10, p960, 3p |
| Abstrakt: |
We show that thermally stimulated luminescence is an important method for detecting insulating impurity phases that commonly occur in high Tc superconductors. The technique is sensitive to impurity phases at <1% level with a probe depth of ∼ 1 μm, which is the region of interest for many superconductor applications. Samples of Y2O3, Y2BaCuO5, YBa2Cu3O6.2, BaCO3, Ba3CuO4, BaCuO2, and YBa2Cu3Ox (x≊7) were investigated. All but the high quality sintered pellets of YBa2Cu3Ox exhibited relatively intense luminescence. The absence of luminescence, and thus of insulating phases, is correlated with low values of rf surface resistance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
