Title :
Electrostriction mechanism in electron-irradiated ferroelectric copolymer: a frequency response model
Author :
DeReggi, A.S. ; Balizer, E. ; Neumann, D.A. ; Bateman, F.
Author_Institution :
Polymer Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
We are investigating the physical mechanism behind the large electrostriction in the electron-irradiated copolymer of vinylidene fluoride and trifluoroethylene (mass ratio 1/1). We report on a time-resolved measurement of the thickness change that follows the application of a voltage step. This change is detected by monitoring deviations of a laser beam reflected from the electroded sample surface. We observe a prompt initial response that then decays with a relaxation time of 1 s. A model is proposed involving mobile charges that screen changes of the internal field
Keywords :
electron beam effects; electrostriction; ferroelectric materials; frequency response; polymer blends; electroded sample surface; electron irradiation; electrostriction mechanism; ferroelectric copolymer; frequency response model; internal field; mobile charges; relaxation time; thickness change; time-resolved measurement; trifluoroethylene; vinylidene fluoride; voltage step; Electrostriction; Ferroelectric materials; Laser beams; Laser modes; Laser theory; Laser transitions; Monitoring; Surface emitting lasers; Thickness measurement; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-6413-9
DOI :
10.1109/CEIDP.2000.885259
