scholarly journals Polarization vortex domains induced by switching electric field in ferroelectric films with circular electrodes

2014 ◽  
Vol 90 (2) ◽  
Author(s):  
Laurent Baudry ◽  
Anaïs Sené ◽  
Igor A. Luk'yanchuk ◽  
Laurent Lahoche ◽  
James F. Scott
Keyword(s):  
Electric Field ◽  
Ferroelectric Films ◽  
Polarization Vortex

scholarly journals Size and temperature effects on dielectric breakdown of ferroelectric films

2020 ◽  
Author(s):  
Sheng Tong
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Operating Temperature ◽  
Electric Energy ◽  
Ferroelectric Films ◽  
Lead Lanthanum Zirconate Titanate ◽  
Dimensional Parameters ◽  
Electric Energy Density

Abstract The paper introduces a model of dielectric breakdown strength. The model integrated thermal breakdown and defect models, representing the relationship between the electric field of ferroelectric films and dimensional parameters and operating temperature. This model is verified with experimental results of the lead lanthanum zirconate titanate (PLZT) films of various film thickness (d = 0.8 – 3 mm), electrode area (A = 0.0020 – 25 mm2) tested under a range of operating temperature (T = 300 – 400 K) with satisfying fitting results. Also learned is a relationship that the recoverable electric energy density is directly proportional to the square of breakdown electric field. This relationship is found viable in predicting the electric energy density in terms of variables of d, A, and T for the PLZT films.

Electric field induced macroscopic flow in free-standing ferroelectric films

1991 ◽  
Vol 122 (1) ◽  
pp. 253-260 ◽  
Author(s):  
Gerd Hauck ◽  
Hans Dieter Koswig
Keyword(s):  
Electric Field ◽  
Ferroelectric Films ◽  
Free Standing

Intrinsic and extrinsic effects on the electrotoroidic switching in a ferroelectric notched nanodot by a homogeneous electric field

2019 ◽  
Vol 21 (45) ◽  
pp. 25011-25022
Author(s):  
Hai Dinh-Van ◽  
Le Van Lich ◽  
Tinh Quoc Bui ◽  
Tuan Van Le ◽  
Trong-Giang Nguyen ◽  
...  
Keyword(s):  
Electric Field ◽  
Homogeneous Electric Field ◽  
Extrinsic Effects ◽  
Polarization Vortex

Control of polarization vortex switching in a ferroelectric notched nanodot by a homogeneous electric field under intrinsic and extrinsic effects.

Enhancement of photoelectrochemical performance in ferroelectric films via the introduction of an Au buffer layer

2021 ◽  
Vol 42 (11) ◽  
pp. 112701
Author(s):  
Dawei Cao ◽  
Ming Li ◽  
Jianfei Zhu ◽  
Yanfang He ◽  
Tong Chen ◽  
...  
Keyword(s):  
Electric Field ◽  
Buffer Layer ◽  
Water Splitting ◽  
Charge Separation ◽  
Sol Gel ◽  
Ferroelectric Films ◽  
Photoelectrochemical Performance ◽  
Band Bending ◽  
Polarization Electric Field ◽  
Pec Water Splitting

Abstract The inefficient separation of photogenerated carriers has become a serious problem that limits the photoelectrochemical (PEC) performance of semiconductors. Herein, a sol-gel method was used to prepare BiFeO3 ferroelectric thin films with FTO and FTO/Au as substrates, respectively. The polarization electric field of the ferroelectric can more effectively separate the carriers generated in the photoelectrode. Meanwhile, the introduction of an Au buffer layer can reduce the resistance in the process of charge transfer, accelerate the carrier migration, and enhance the efficiency of the charge separation. Under light irradiation, Au/BiFeO3 photoelectrode exhibited an extraordinary improvement in PEC water splitting compared with BiFeO3. In addition, the ferroelectric polarization electric field causes band bending, which further accelerates the separation of electrons and holes and improves the PEC performance of the photoelectrode. This work promotes the effective application of ferroelectric films in PEC water splitting.

Asymmetric Polarization Vortex in Compositionally Graded Ferroelectrics and Unusual Switching of Toroidal Ordering by an Irrotational Electric Field

2019 ◽  
Author(s):  
Le Van Lich ◽  
Minh-Tien Le ◽  
Tinh Quoc Bui ◽  
Thanh-Tung Nguyen ◽  
Takahiro Shimada ◽  
...  
Keyword(s):  
Electric Field ◽  
Polarization Vortex

Phenomenological Model for Pyroelectric Effects of Nano Graded Ferroelectric Films

2011 ◽  
Vol 110-116 ◽  
pp. 3358-3363
Author(s):  
Hui Chen ◽  
Tai Min Cheng
Keyword(s):  
Electric Field ◽  
Film Thickness ◽  
External Electric Field ◽  
Local Structure ◽  
Ferroelectric Films ◽  
Film Properties ◽  
Polarization Distribution ◽  
Ginzburg Landau ◽  
Pyroelectric Properties ◽  
Practical Applications

In order to improve the pyroelectric properties of nanograded ferroelectric films (NGFF), and provide a theoretical reference for practical applications, the generalized Ginzburg-Landau-Denvonshire (GLD) theory is adopted to investigate the pyroelectric properties of the NGFF. A function is introduced to characterize the local structure in nanograded films. Influence of the local structure, film thickness and external electric field on the polarization distribution and pyroelectric properties are mainly discussed. The numerical results show that parameterand film thickness are two very important factors that influence the film properties, larger values lead to smaller spontaneous polarization and lower pyroelectric peak. Different directions of the external electric field can lead to greatly different effects on pyroelectric behaviors, whose effects is to expand the working temperature region, or else, change the order of phase transition.

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