Polarization Reversal Characteristics in Capacitors with a Metal/Insulator/Ferroelectric/Metal Structure

2021 ◽  
Vol 21 (9) ◽  
pp. 4911-4915
Author(s):  
Sheik Abdur Rahman ◽  
Muhammad Saqib ◽  
Shenawar Ali Khan ◽  
Hafiz Mohammad Mutee Ur Rehman ◽  
Woo Young Kim
Keyword(s):  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Metal Structure ◽  
Ferroelectric Film ◽  
The Other ◽  
Polystyrene Film ◽  
Polarization Reversal ◽  
Metal Insulator ◽  
Polarization Voltage ◽  
Poly Vinylidene Fluoride

A metal/insulator/ferroelectric/metal structure was fabricated using a covering of approximately 10 nm thick of an insulating polystyrene film on a ferroelectric poly(vinylidene fluoride-trifluoroethylene) film. To fabricate several samples, the thickness of the ferroelectric film was held constant while the thickness of the insulating film was varied from 8 to 24 nm. The polarization– voltage relationships were measured to extract the main parameters, in this case the remanent polarization, depolarization, coercive voltage and biased voltage values. As the insulating film becomes thicker, the remanent polarization and coercive voltage values tended to increase. On the other hand, depolarization and biased voltage values decreased. By analyzing the above mentioned parameters, a certain optimum insulator thickness could be predicted. This work shows that metal/insulator/ferroelectric/metal devices are more useful than metal/ferroelectric/metal capacitors.

scholarly journals The Influence Mechanism of Temperature and Storage Period on Polarization Properties of Poly (Vinylidene Fluoride–Trifluoroethylene) Ultrathin Films

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 301
Author(s):  
Xingjia Li ◽  
Zhi Shi ◽  
Xiuli Zhang ◽  
Xiangjian Meng ◽  
Zhiqiang Huang ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Storage Period ◽  
Testing Temperature ◽  
Fatigue Properties ◽  
Inhibition Mechanism ◽  
Poly Vinylidene Fluoride ◽  
High Level ◽  
And Storage

The effect of testing temperature and storage period on the polarization fatigue properties of poly (vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) ultrathin film devices were investigated. The experimental results show that, even after stored in air for 150 days, the relative remanent polarization (Pr/Pr(0)) of P(VDF–TrFE) of ultrathin films can keep at a relatively high level of 0.80 at 25 °C and 0.70 at 60 °C. To account for this result, a hydrogen fluoride (HF) formation inhibition mechanism was proposed, which correlated the testing temperature and the storage period with the microstructure of P(VDF–TrFE) molecular chain. Moreover, a theoretical model was constructed to describe the polarization fatigue evolution of P(VDF–TrFE) samples.

Ferroelectricity of poly(vinylidene fluoride) homopolymer Langmuir–Blodgett nanofilms

2014 ◽  
Vol 2 (33) ◽  
pp. 6727-6731 ◽  
Author(s):  
Huie Zhu ◽  
Shunsuke Yamamoto ◽  
Jun Matsui ◽  
Tokuji Miyashita ◽  
Masaya Mitsuishi
Keyword(s):  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Langmuir Blodgett ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Fatigue Endurance

As-deposited PVDF LB nanofilms with a complete β phase show a remarkable remanent polarization and long fatigue endurance greater than 105cycles.

The Evolution of Activation Field with Temperature in Ferroelectric Copolymer of Vinylidene Fluoride and Trifluoroethylene Films

2013 ◽  
Vol 785-786 ◽  
pp. 761-766
Author(s):  
Lin Jiang ◽  
Xiang Jian Meng ◽  
X. L. Zhao ◽  
B. B. Tian ◽  
B. L. Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Glass Transition ◽  
Vinylidene Fluoride ◽  
Ferroelectric Thin Film ◽  
Transition Process ◽  
The Other ◽  
Polarization Reversal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polyimide Substrate

Vinylidene fluoride and trifluoroethylene [P(VDF-TrFE)] ferroelectric thin film was spin-coated on Au-coated polyimide substrate and its polarization reversal was investigated by analyzing the evolution of activation field (α) with temperature. Although α is nearly a constant between 300 and 330 K, it increases linearly when temperature rates between 200 and 230 K, and between 230 and 300 K. On the other hand, the intensity of X-ray diffraction for P(VDF-TrFE) films from 200 to 330 K indicates that glass-transition process plays a significant role in both the microstructure and the polarization reversal of P(VDF-TrFE) copolymer.

Field-induced phase transition and its impact on the magnetoelectric effect in P(VDF-HFP)/Metglas laminates

2009 ◽  
Vol 1199 ◽  
Author(s):  
David Sheng-Guo Lu ◽  
Xin Zhou ◽  
Zhao Fang ◽  
Qiming Zhang
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Room Temperature ◽  
Remanent Polarization ◽  
Magnetoelectric Effect ◽  
Vinylidene Fluoride ◽  
Bias Field ◽  
Magnetic Bias ◽  
Field Range ◽  
Poly Vinylidene Fluoride

AbstractThe field-induced phase transition driven by electric field was observed in poly(vinylidene fluoride – hexafluoropropylene) (P(VDF-HFP)) 90/10 wt% copolymers. Experimental results indicated that the electric field may remarkably affect the remanent polarization in terms of changing the D-E loop forms from double loops to single loop, starting from 68 MV/m, and completing at 216 MV/m. It was found that the remanent polarization as well as the piezoelectric constant d31 had a linear relationship with the poling electric field in above electric field range. Thus the magnetoelectric (ME) coupling coefficient ME in P(VDF-HFP)/Metglas laminates increased with the poling electric field. Moreover, the cyclic poled ME device demonstrated different peak d.c. magnetic bias field HDC on the ME - HDC curves from conventional room temperature poled ones. The peak ME coefficient obtained was 4 V/cm Oe.

Ferroelectric and Piezoelectric Properties of Blends of Poly(Vinylidene Fluoride Trifluoroethylene) and a Graft Elastomer

1999 ◽  
Vol 600 ◽  
Author(s):  
J. Su ◽  
Z. Ounaies ◽  
J. S. Harrison
Keyword(s):  
Room Temperature ◽  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Mechanical Stiffness ◽  
Blend Films ◽  
Relative Composition ◽  
Poly Vinylidene Fluoride ◽  
Piezoelectric Strain ◽  
Strain Coefficient

AbstractA piezoelectric polymeric blend system has been developed. The system contains two components: ferroelectric poly(vinylidene fluoride-trifluoroethylene) and graft elastomer. The remanent polarization, Pr, and the piezoelectric strain coefficient, d31, of the blends have been studied as a function of relative composition of the two components, temperature and frequency. Both blended copolymer and graft unit in the elastomer contribute to the total crystallinity of the blend-system, and hence to the remanent polarization and piezoelectricity. The piezoelectric strain coefficient, d31, of the blend systems shows dependence on both the remanent polarization and the mechanical stiffness, which in turn are determined by the fraction of the two components in the blends. This mechanism makes it possible for the piezoelectric strain response of the blend to be tailored by adjusting the relative composition. Although Pr of the copolymer is higher than that of the blends, the blend films containing 75 wt.% copolymer exhibit a higher d31 at room temperature, possibly due to their lower modulus. The blend films containing 50 wt.% copolymer exhibit a constant value of d31, from room temperature to 70°C.

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