THIN FERROELECTRIC FILM DOMAIN STRUCTURE
A. A. Sokolov, S. D. Ivanov
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: ferroelectric, thin films, domain structure, pyroelectric constant
Abstract
Methods for determining the domain structure of thin ferroelectric films from the time dependence of the pyroelectric response to short pulsed surface heating are considered. The problem of finding the distribution of the pyroelectric constant over the thickness from the time dependence of the pyroelectric current is the solution of the Fredholm equation of the first kind. Despite the fact that this problem is ill-posed in general, it can be solved under additional assumptions about the resolvent. The assumption that the domains are wedges allows the depth distribution of the pyroelectric constant in a thin barium-strontium niobate film to be determined.
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