| Autor: |
Othon, C. M., Bateman, F. B., Ducharme, Stephen |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 7/1/2005, Vol. 98 Issue 1, p014106, 6p, 1 Chart, 8 Graphs |
| Abstrakt: |
The effect of irradiation on the ferroelectric properties of Langmuir-Blodgett films of the copolymer poly(vinylidene fluoride-trifluoroethylene) was investigated using 1-MeV electrons for doses from 0.16 to 1.10 MGy, where 1 Gray (Gy)=100 rad. Irradiation causes a systematic decrease in the phase-transition temperature, crystallinity, and spontaneous polarization of the films. The crystallinity and spontaneous polarization of the films decreased by amounts proportional to the dose, both tending toward zero near a dose of 1.30 MGy. The ferroelectric-paraelectric phase-transition temperature, however, was only reduced by about 12%, indicating that the primary effect of irradiation was to convert a crystalline ferroelectric material to a noncrystalline dielectric. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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