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Dielectric properties of Pb0.5Ca0.5TiO3 thin films

AuthorsMendiola, J.; Jiménez, Ricardo ; Ramos, Pablo ; Alemany, C.; Bretos, Íñigo ; Calzada, M. L.
Issue DateJul-2005
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 98(2): 024106 (2005)
AbstractA dielectric study is carried out on chemical solution-deposited calcium lead titanate (Pb,Ca)TiO3 thin films, with calcium contents of 50 at. %, by measuring capacitance versus voltage as a function of temperature. A moderate ferroelectric activity is observed that remains in a broad temperature range, and that depends on the applied voltage and thickness of the films. This behavior is associated with the built-in fields generated as result of the space charge inside the films. From the diffusivity of dielectric constant versus temperature (K′−T) curves, the relaxorlike nature of the films is also demonstrated. The feasibility of these films for fabrication of voltage tuneable capacitors and charge store devices (dynamic random access memories) is confirmed.
Description6 pages, 9 figures.
Publisher version (URL)http://dx.doi.org/10.1063/1.1984072
Appears in Collections:(ICMM) Artículos
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