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Information × Registration Number 0207U002619, 0101U007083 , R & D reports Title Selfpolarized ferroelectric films: prospective production tehnologies and investigations of the selfpolarization mechanism popup.stage_title Head Glinchuk Maya Davidovna, Registration Date 06-02-2007 Organization I.N.Frantsevich Institute for Probmens of Materials Sciences Ukrainian Academy of Science popup.description2 PZT films were investigated by ellipsometry, dynamic pyroeffect, X-ray spectroscopy methods and by investigations of polar hysteresis loops. The influence of electrodes and structure defects related to technology of films platting, illumination and annealing in oxiden and hydrogen atmospheres on selfpolarization effect in the direction of normal to film surface was studied. Polarization profiles obtained experimentally by ellipsometry method were compared with those calculated with and without taking into account a depolarization field. It was shown that theoretical calculations describe pretty good a variation of polarization value with distance from surface of self-polarized film. Ti3+ centers shifted from usual position of Ti ions by oxygen vacancies were identified in BaTiO3 films by ESR method. The analysis of obtained results gave a posibility to conclude that appearance of intrinsic electric field on the boundary of electrodes or substrate and film over difference of their lattice constants, coefficients of thermal expansion and growth defects is the reason of selfpolarization phenomenon. Product Description popup.authors popup.nrat_date 2020-04-02 Close