Pulsed-laser beam profiling for deposition of high-Tc YBCO films
Abstract
A special shaping of YAG:Nd3+ laser beam profile has been found to improve homogeneity and Tc of YBa2Cu3O7-δ films being deposited by the pulsed laser. Targets of a considerably non-stoichiometric composition and substrates of slanting cuts have turned to be necessary for the high-quality film growing. Multiple droplets and solid particles ejected from the target surface by the infrared radiation are removed successfuly from the laser-induced plasma by use of a velocity filter.
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