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Information × Registration Number 0207U005478, 0106U000085 , R & D reports Title The investigation of physical properties of nanosized perovskites popup.stage_title Head Bykov Igor Pavlovich, Registration Date 24-04-2007 Organization I.N.Frantsevich Institute for Probmens of Materials Sciences Ukrainian Academy of Science popup.description2 The influence of metalic electrodes on properties of thin ferroelectric films was calculated in the framework of Ginzburg-Landau phenonemological theory. It is shown that substrate can induce ferroelectric-paraelectric phase transition at some value of screening length and that all properties of films are depended on electrode characteristics. It gives a possibility to optimize the film properties important for applications by electrode type variation - superconducting, metallic or semiconducting. Phenomenological theory of multiaxial ferroelectric films with three order parameters was considered. Phase diagram of PbZr0.5Ti0.5O3 film is calculated. Dependence of piroelectric coefficient and dielectric permittivity on thickness and temperature show the existence of electret-like polar state, i.e. pyroelectricity exists below critical thickness of ferro-paraelectric phase transition. Product Description popup.authors popup.nrat_date 2020-04-02 Close