Polarization profiles of polyvinylidene fluoride films polarized by a focused electron beam

Journal Article · Sun Jan 01 00:00:00 EST 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342536· OSTI ID:6598183

Schilling, D; Dransfeld, K; Bihler, E; Holdik, K; Eisenmenger, W

The depth profiles of the polarization in films of polyvinylidene fluoride (PVDF) as well as in vinylidene-fluoride--trifluoroethylene (VDF-TrFE) copolymer films polarized by a focused electron beam were investigated using the piezoelectrically generated pressure step method. The dominant polarization exhibits a broad maximum inside the film. The position of this maximum depends not only on the energy of the incident electrons but also on the material parameters of the sample. Close to the surface exposed to the electron beam we have in addition observed a small secondary maximum of opposite polarization (amounting to about 1 mC/m/sup 2/). A qualitative model is presented for the poling of films of PVDF and its copolymers with TrFE by focused electron beam accounting for most of the observed features. The application of electron beams for the poling of ferroelectric films allows the production of piezoelectric bimorphs. By using a well-focused electron beam also ferroelectric domains of very small lateral dimensions can be created which could become important for ferroelectric data storage.

• Research Organization: Fakultaet f uer Physik, Universitaet Konstanz, Postfach 5560, 7750 Konstanz, Federal Republic of Germany
• OSTI ID: 6598183
• Journal Information: J. Appl. Phys.; (United States), Vol. 65:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPOLYMERS
PHYSICAL RADIATION EFFECTS
FLUORINE COMPOUNDS
POLYVINYLS
DIELECTRIC PROPERTIES
ELECTRON BEAMS
FERROELECTRIC MATERIALS
PIEZOELECTRICITY
POLARIZATION
THIN FILMS
BEAMS
ELECTRICAL PROPERTIES
ELECTRICITY
FILMS
HALOGEN COMPOUNDS
LEPTON BEAMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PHYSICAL PROPERTIES
POLYMERS
RADIATION EFFECTS
360605* - Materials- Radiation Effects