Title :
Dependence of the PVDF ferroelectric polarization on the electric field obtained by two methods
Author :
Wisniewski, Célio ; Ferreira, G.F.Leal ; Araujo, W.M. ; Giacometti, JosC A.
Author_Institution :
Inst. de Fisica de Sao Carlos, Sao Paulo Univ., Brazil
Abstract :
We show that the dependence of ferroelectric polarization on the electric field in PVDF can be determined either using the constant current or a modified Sawyer-Tower technique. Measurements with and without polarization switching were performed and prior to each one the sample was short-circuited for several hours. The results compare very well and the small difference was attributed to the existence of a delayed polarization which is not accounted for in the calculation
Keywords :
dielectric hysteresis; dielectric polarisation; ferroelectric materials; polymers; PVDF; constant current method; electric field dependence; ferroelectric polarization; modified Sawyer-Tower technique; polarization switching; Current measurement; Electric variables measurement; Electrodes; Ferroelectric materials; Hysteresis; Performance evaluation; Polarization; Polymers; Time measurement; Voltage;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832124
