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Which outcome occurs when pulsed-laser deposition parameters are improperly calibrated?

A)Non-stoichiometric film composition results
B)Increased substrate crystal lattice alignment
C)Enhanced thin-film optical transparency
D)Decreased laser-induced plasma temperature

💡 Explanation

Non-stoichiometric film is caused by `ablation fractionation`; the laser's energy distribution causes preferential ablation of specific elements because lighter elements ablate faster. The resulting film becomes non-stoichiometric, therefore composition shifts, rather than enhanced crystallinity due to optimized deposition.

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