A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990
Thin films of YBa2Cu3O7-δ have been grown in an oxygen atmosphere by pulsed laser deposition using two synchronized lasers, separated by a variable delay (1 μs-10 ms). The ablated fragments from the first laser lead to formation of a blast wave in O2, leaving behind a rarefied ambient. If the second laser is triggered before the O 2 pressure returns to equilibrium, the resulting films show a decrease in transition temperature with an expanded c-lattice parameter caused by defects in the nonchain sites of YBa2Cu3O 7-δ. This demonstrates the necessity of maintaining a sufficiently high concentration of oxygen within the time period that the fragments travel and deposit on the substrate.
A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990
J. Mannhart, R.P. Huebener, et al.
Physica A: Statistical Mechanics and its Applications
A. Gupta, M.Y. Chern, et al.
Physica C: Superconductivity and its applications
A. Gupta, R. Jagannathan
Applied Physics Letters