Temperature-dependent secondary electron yield from ion bombardment of gold and copper oxide superconductors
H. Rothard, P. Lorenzen, N. Keller, O. Heil, D. Hofmann, J. Kemmler, K. Kroneberger, S. Lencinas, K. O. Groeneveld
DOI 10.1103/PhysRevB.38.9224 · Physical Review B
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Abstract
First measurements on the ion-induced kinetic secondary-electron emission have been performed with low beam current densities in the low target temperature range 70 K<T<300 K under good vacuum conditions (p≈5×10−7 Pa) from sputter-cleaned Au foils (1000 Å) and from YBa2Cu3O7. The secondary-electron yield γ decreases with decreasing temperature of Au and YBa2Cu3O7 targets. This is in contrast to the expectations based on previous experiments and theoretical considerations. In the case of YBa2Cu3O7, a strong enhancement of γ below the superconducting transition temperature Tc is observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 96 | Pressure not reported | onset |
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