Origin and control of the lead-enriched near-surface region of (Pb, La)TiO[sub 3]

Vasco, E.; Bo¨hme, O.; Román, E.; Zaldo, C.
April 2001
Applied Physics Letters;4/2/2001, Vol. 78 Issue 14, p2037
Academic Journal
The chemical composition, structure and extension of the Pb-enriched nonferroelectric near-surface region of stoichiometric (Pb, La)TiO[sub 3] ferroelectric films was characterized by x-ray diffraction, Rutherford backscattering spectroscopy and x-ray photoemission spectroscopy. Its origin as a result of the Pb excess segregation from the growing (Pb, La)TiO[sub 3] bulk and subsequent oxidation was revealed. A postdeposition procedure to control its composition and thereby its properties was provided. Thus, a decrease of the near-surface Pb excess of about 75% was achieved. © 2001 American Institute of Physics.


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