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Gomes, MJM
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Abstract (EN):
Lanthanum modified lead zirconate titanate (PLZT) thin films were fabricated on sapphire (0001) substrate by sol-gel method. The cell parameters of films were calculated with help of whole pattern fitting procedure. The study of optical properties revealed the fractal behaviour of absorption coefficient near the absorption edge. The strong shift of the absorption edge in thin films in comparison with bulk PLZT was observed. This shift could not be caused just by the presence of the strain. The increased disorder and polarization fluctuations were suggested as the additional reason that was supported by nearly twice higher value of the exponential tail width in the films in comparison with bulk PLZT.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
6
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