scholarly journals Phonon Renormalization Induced by Electric Field in Ferroelectric Poly(Vinylidene Fluoride–Trifluoroethylene) Nanofibers

2020 ◽  
Vol 13 (3) ◽  
Author(s):  
Lan Dong ◽  
Qing Xi ◽  
Jun Zhou ◽  
Xiangfan Xu ◽  
Baowen Li
Keyword(s):  
Electric Field ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Phonon Renormalization

Preparation and electrical properties of γ form poly(vinylidene fluoride) thin film by vapour deposition in the presence of an electric field

1991 ◽  
Vol 202 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Akiyoshi Takeno ◽  
Norimasa Okui ◽  
Tetsuji Kitoh ◽  
Michiharu Muraoka ◽  
Susumu Umemoto ◽  
...  
Keyword(s):  
Thin Film ◽  
Electrical Properties ◽  
Electric Field ◽  
Vapour Deposition ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Rotation of polar axis of β-form poly(vinylidene fluoride) under high electric field

1984 ◽  
Vol 57 (1) ◽  
pp. 139-149 ◽  
Author(s):  
Ken'ichi Nakamura ◽  
Yoshikichi Teramoto ◽  
Naohiro Murayama
Keyword(s):  
Electric Field ◽  
Vinylidene Fluoride ◽  
Polar Axis ◽  
High Electric Field ◽  
Poly Vinylidene Fluoride

Electrocaloric and electrostrictive effect of polar P(VDF–TrFE–CFE) terpolymers

2013 ◽  
Vol 03 (02) ◽  
pp. 1350015 ◽  
Author(s):  
Sheng-Guo Lu ◽  
Hui Xiong ◽  
Aixiang Wei ◽  
Xinyu Li ◽  
Qiming Zhang
Keyword(s):  
Electric Field ◽  
Temperature Change ◽  
Vinylidene Fluoride ◽  
Dielectric Material ◽  
Entropy Change ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Change ◽  
Poly Vinylidene Fluoride ◽  
Electrostrictive Effect ◽  
Rigid Ion Model

The electrocaloric effect (ECE) is the adiabatic temperature change or isothermal entropy change caused by the polarization change of a dielectric material when subjected to a change of external electric field. The electrostrictive effect is a form of elastic deformation of a dielectric induced by an electric field, associated with those components of strain which are independent of reversal field direction. It was found that both the ECE, e.g., adiabatic temperature change, and the electrostrictive strain in poly(vinylidene fluoride–trifluoroethylene–chlorofluoroethylene) (P(VDF–TrFE–CFE)) terpolymers are proportional to the square of the electric field. The adiabatic temperature change ΔT of ECE versus electric field can be illustrated using a modified Belov–Goryaga equation. ΔT is proportional to E2 when E is small. For electrostrictive effect, the rigid-ion model assumes that the anharmonic movement of the ions leads to the quadratic strain–electric field relation. The quotient of electrostrictive coefficient Q over the phenomenological coefficient β is empirically a constant, indicating that the larger the electrostrictive coefficient, the larger the ECE, which opens a new way to find out new electrocaloric materials.

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