Changes in photo-induced pyroelectric transients during polarization reversal in VDF-TrFE copolymers

Author

Sakai, Shigeru ; Ishida, Motohisa ; Date, Munehiro ; Furukawa, Takeo

Author_Institution

Nippon Electron. Coll., Tokyo, Japan

fYear

1991

fDate

25-27 Sep 1991

Firstpage

472

Lastpage

476

Abstract

The pyroelectric current transient induced by laser irradiation was measured for VDF/TrFE (vinylidene fluoride-trifluoroethylene) copolymers in order to examine the polarization distribution in the thickness direction developed during ferroelectric polarization reversal. It is found that the polarization profile is uniform for the case of relatively fast switching. On the other hand, the slow switching process develops nonuniform polarization profiles, suggesting that polarization reversal progress from the positively biased side

Keywords

dielectric polarisation; electrets; ferroelectric transitions; polymer blends; pyroelectricity; VDF-TrFE copolymers; electret; fast switching; ferroelectric polarization reversal; laser irradiation; photo-induced pyroelectric transients; polarization distribution; polarization reversal; slow switching; thickness direction; vinylidene fluoride-trifluoroethylene; Chemical lasers; Current measurement; Ferroelectric materials; Hysteresis; Laser beams; Polarization; Pulse modulation; Pulsed laser deposition; Pyroelectricity; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)

Conference_Location

Berlin

Print_ISBN

0-7803-0112-9

Type

conf

DOI

10.1109/ISE.1991.167258

Filename

167258