Ultrathin ferroelectric Langmuir–Blodgett films are studied using an electrostatic force microscope (EFM). The films were deposited by a subsequent transfer of monolayers of a ferroelectric polymer from the water surface onto Si substrates covered with Al electrodes. A film was switched locally by a voltage applied between a tip and the Al electrode. The dynamics of the electric field relief above a switched ferroelectric domain is studied by EFM imaging with simultaneous control of the topographic relief. In order to explain an image contrast a simple model for a thin ferroelectric film is discussed which takes into account the remanent polarization of the film, the surface charge, and interface work functions.

Switching of a ferroelectric polymer Langmuir-Blodgett film studied by Electrostatic Force Microscopy

BARBERI, Riccardo Cristoforo;DE SANTO, Maria Penelope;
2001-01-01

Abstract

Ultrathin ferroelectric Langmuir–Blodgett films are studied using an electrostatic force microscope (EFM). The films were deposited by a subsequent transfer of monolayers of a ferroelectric polymer from the water surface onto Si substrates covered with Al electrodes. A film was switched locally by a voltage applied between a tip and the Al electrode. The dynamics of the electric field relief above a switched ferroelectric domain is studied by EFM imaging with simultaneous control of the topographic relief. In order to explain an image contrast a simple model for a thin ferroelectric film is discussed which takes into account the remanent polarization of the film, the surface charge, and interface work functions.
2001
Ferroelectric polymer; Electrostatic Force Microscopy; Local polarization
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/124695
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