Ferroelectric Thin Films and Composites

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 7814

Special Issue Editor


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Guest Editor
School of Civil Engineering, Harbin Institute of Technology, Harbin, China
Interests: ferroelectric thin films; relaxor-ferroelectric single crystals; ferroelectric tunnel junctions; Landau theory; frustrated systems; mechanics of functional materials; intelligent structures; machine learning methods

Special Issue Information

Dear Colleagues,

Ferroelectric materials are of great interest due to their potential applications in various functional devices, such as piezoelectric sensors, transducers, energy harvesters, memories, microwave filters, resistors in integrated circuits, and microelectromechanical systems. Over the past decades, extensive research has been focused on the fabrication and characterization of ferroelectric materials, and on understanding their mechanics. Great progress has been made both in experiments and theory, leading to flourishing applications using ferroelectric materials. 

Therefore, we would like to invite you to submit your original research to this Coatings Special Issue entitled “Ferroelectric Thin Films and Composites”. The scope of this Special Issue includes all aspects of research within the broad fields of coatings and ferroelectric materials, including experimental and theoretical studies as well as reviews. In particular, the topics of interest include but are not limited to:

  • Ferroelectric thin films: fabrication, characterization, related theory, and applications.
  • Ferroelectric composites: fabrication, characterization, simulation, and applications.
  • Functional devices and their applications.
  • Artificial-intelligence-driven material characterization and data mining.
  • Any other aspects of ferroelectric materials.

Prof. Dr. Xiaoyan Lu
Guest Editor

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Published Papers (3 papers)

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Research

8 pages, 3418 KiB  
Article
Strain Engineering of Domain Coexistence in Epitaxial Lead-Titanite Thin Films
by Yanzhe Dong, Xiaoyan Lu, Jinhui Fan, Si-Young Choi and Hui Li
Coatings 2022, 12(4), 542; https://doi.org/10.3390/coatings12040542 - 18 Apr 2022
Cited by 3 | Viewed by 2491
Abstract
Phase and domain structures in ferroelectric materials play a vital role in determining their dielectric and piezoelectric properties. Ferroelectric thin films with coexisting multiple domains or phases often have fascinating high sensitivity and ultrahigh physical properties. However, the control of the coexisting multiple [...] Read more.
Phase and domain structures in ferroelectric materials play a vital role in determining their dielectric and piezoelectric properties. Ferroelectric thin films with coexisting multiple domains or phases often have fascinating high sensitivity and ultrahigh physical properties. However, the control of the coexisting multiple domains is still challenging, thus necessitating the theoretical prediction. Here, we studied the phase coexistence and the domain morphology of PbTiO3 epitaxial films by using a Landau–Devonshire phenomenological model and canonic statistical method. Results show that PbTiO3 films can exist in multiple domain structures that can be diversified by the substrates with different misfit strains. Experimental results for PbTiO3 epitaxial films on different substrates are in good accordance with the theoretical prediction, which shows an alternative way for further manipulation of the ferroelectric domain structures. Full article
(This article belongs to the Special Issue Ferroelectric Thin Films and Composites)
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8 pages, 3091 KiB  
Article
Microstructure and Electric Properties of Bi2O3-Doped (K0.5Na0.5)NbO3 Lead-Free Ceramics
by Jiaqi Li, Junjun Wang, Fengmin Wu, Hui Ma, Tianyi Ma, Yu Tian, Danqing Liu and Bin Yang
Coatings 2022, 12(4), 526; https://doi.org/10.3390/coatings12040526 - 13 Apr 2022
Cited by 7 | Viewed by 2180
Abstract
In this paper, Bi2O3-doped (K0.5Na0.5)NbO3 (x = 0.1, 0.2, 0.3, 0.4) lead-free ceramics are prepared by a conventional solid-state reaction and analyzed by studying the structure, ferroelectric, and piezoelectric properties. It is found that [...] Read more.
In this paper, Bi2O3-doped (K0.5Na0.5)NbO3 (x = 0.1, 0.2, 0.3, 0.4) lead-free ceramics are prepared by a conventional solid-state reaction and analyzed by studying the structure, ferroelectric, and piezoelectric properties. It is found that the doping of Bi2O3 increases the proportion of the trigonal phase in KNN ceramics, thus enabling the construction of KNN ceramics with an orthogonal–trigonal phase boundary at room temperature. At the same time, doping with Bi2O3 can reduce the grain size and improve grain size uniformity of the ceramics. The KNN-0.1%Bi2O3 ceramic has the best piezoelectric properties in all composition; the results are as follows: d33 = 121pC/N, kp = 0.474, kt = 0.306. Full article
(This article belongs to the Special Issue Ferroelectric Thin Films and Composites)
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9 pages, 2334 KiB  
Article
Enhanced Piezoresponse and Dielectric Properties for Ba1-XSrXTiO3 Composition Ultrathin Films by the High-Throughput Method
by Nana Zhang, Di Wang, Jie Wang, Hong Fang, Bin He, Jinrui Guo, Yue Han, Peng Zhang, Chaoqun Shi, Yanan Chen, Qixiang Wang, Miaojuan Ren and Weiming Lü
Coatings 2021, 11(12), 1491; https://doi.org/10.3390/coatings11121491 - 3 Dec 2021
Cited by 2 | Viewed by 2366
Abstract
The stacked single-unit cell Ba1-xSrxTiO3 (BSTO) thin film designed by the high-throughput method is fabricated by layer-by-layer deposition by laser molecular beam epitaxy, and its ferroelectric and dielectric characteristics as a function of Sr concentration are comprehensively investigated. [...] Read more.
The stacked single-unit cell Ba1-xSrxTiO3 (BSTO) thin film designed by the high-throughput method is fabricated by layer-by-layer deposition by laser molecular beam epitaxy, and its ferroelectric and dielectric characteristics as a function of Sr concentration are comprehensively investigated. The permittivity of BSTO exhibits a monotonous increase by Sr with a plateau in the region of 14% < Sr < 85%. Meanwhile, at the low Sr doping regime, the piezoelectric response has been discovered, and the maximum piezoresponse and d33 can reach approximately 139.05 pm and 88 pm/V once an appropriate Ba/Sr ratio is formed, exhibiting a coexistence of a dielectric property and giant piezoresponse. This effective piezoelectric constant d33 value is significantly larger than the conventional chemical doping scenarios, suggesting that the intra-plane interaction is crucial for designing future promising dielectric and ferroelectric thin films via high-throughput technologies. Full article
(This article belongs to the Special Issue Ferroelectric Thin Films and Composites)
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