Article
Chemistry, Physical
Charanjeet Singh, Vikas N. Thakur, Ashok Kumar
Summary: The study disproved the reservation in the scientific community that resistive switching phenomenon is exclusive to thin films and ultra-thin films, showing that it can also be observed in bulk ferroelectric ceramics controlled by displacement current, exhibiting multi-level resistance states.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Rajasekhar Bhimireddi, Lokeswararao Dhavala, Tukaram Shet, Sai Pavan Prashanth Sadhu, Kumara Raja Kandula, Anees A. Ansari, Jeevan Kumar Padarti
Summary: The physical properties and polarization switching ability of Sr2Bi4Ti5O18-ZnSnO3 composite ceramics were investigated, and it was found that the addition of ZnSnO3 can improve the electrical characteristics of the material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Thomas M. Linker, Ken-ichi Nomura, Shogo Fukushima, Rajiv K. Kalia, Aravind Krishnamoorthy, Aiichiro Nakano, Kohei Shimamura, Fuyuki Shimojo, Priya Vashishta
Summary: We have developed a method called NNQMD-BEC, which combines electric-field dynamics with the Born effective charge (BEC) to extend the Neural Network Quantum Molecular Dynamics (NNQMD) simulation method. We validated NNQMD-BEC for the switching mechanisms of classic ferroelectric PbTiO(3) bulk crystal and 180° domain walls. Our simulations accurately describe the nucleation and growth mechanism during domain wall switching. In triaxially strained PbTiO3 with common strain conditions in many superlattice configurations, we observed the induction of a flux-closure texture with the application of an electric field perpendicular to the original polarization direction.
Article
Physics, Applied
Susumu Minami, Tomohiro Nakayama, Takahiro Shimada
Summary: In this study, the deformation behavior and tensile strength of ferroelectric ceramics (PbTiO3) under high mechanical loading are investigated using first-principles calculations. It is found that the ceramics exhibit superelastic-like nonlinear deformation with large critical strain. The displacement of oxygen atoms due to the ferroelectric phase transition is identified as the cause of this unique nonlinear deformation. Additionally, the piezoelectric coefficient of the ceramics is calculated, showing a singular peak at inflection points of the stress-strain curve.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Anar Singh
Summary: The magnetic properties and exchange bias of BiFeO3 and La2/3Sr1/3MnO3 heterostructures were investigated. The results show that the heterostructures exhibit spin-glass-like state in temperature-dependent behavior, and electrical poling has a considerable impact on the magnetic properties and exchange bias.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
M. J. Zou, Y. L. Tang, Y. P. Feng, W. R. Geng, X. L. Ma, Y. L. Zhu
Summary: This research investigates the impact of flexoelectricity on nanoscale ferroelectric thin films, revealing that the domain switching in strain-gradient PbTiO3 films is influenced by an additional flexoelectric field. The study proposes an effective method to stabilize the ferroelectric polarization in nanoscale ferroelectric films.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Dongxia Tian, Yu Hou, Wanfeng Zhou, Baojin Chu
Summary: The flexoelectric response of Na0.5Bi0.5TiO3-based and (Ba,Sr)TiO3 ferroelectric ceramics with different electrodes was investigated. The study found that the flexoelectric response is strongly dependent on the fabrication methods of the electrodes and the surface effect plays a significant role in the deviation of measured flexoelectric response from the intrinsic response in ferroelectric ceramics.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Yunwei Sheng, Ignasi Fina, Marin Gospodinov, Josep Fontcuberta
Summary: The oscillating short-circuit photocurrent in h-LuMnO3 crystals is found to be largely modulated by polarization back-switching ruled by the imprint field, rather than the prepoling voltage. The study also highlights the significant impact of the imprint field on the polarization dependence of photocurrent.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Andra Georgia Boni, Roxana Patru, Lucian D. Filip, Cristina Chirila, Iuliana Pasuk, Ioana Pintilie, Lucian Pintilie
Summary: Research shows that resistive or capacitive non-ferroelectric elements have a significant impact on switching behavior, leading to an increase in the apparent coercive field or imprint. The observation of negative capacitance regimes depends on the nature of the non-ferroelectric element, and the voltage on the ferroelectric component remains constant during the switching process, reflecting the system passing through non-equilibrium states.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wei-Qiang Liao, Bin-Bin Deng, Zhong-Xia Wang, Ting-Ting Cheng, Yan-Ting Hu, Shu-Ping Cheng, Ren-Gen Xiong
Summary: SA-PFA is an organic molecular ferroelectric material with light-triggered reversible structural changes, showing clear ferroelectricity and optically induced ferroelectric polarization switching behavior. The reversible photoisomerization effect of SA-PFA enables potential application in light-controlled ferroelectric devices.
Article
Chemistry, Multidisciplinary
Anastasia Chouprik, Ekaterina Savelyeva, Evgeny Korostylev, Ekaterina Kondratyuk, Sergey Zarubin, Nikita Sizykh, Maksim Zhuk, Andrei Zenkevich, Andrey M. Markeev, Oleg Kondratev, Sergey Yakunin
Summary: The nanosecond speed of information writing and reading is recognized as one of the main advantages of next-generation non-volatile ferroelectric memory based on hafnium oxide thin films. The study reveals the contribution of domain structure and dielectric layer formed at the electrode interface to the polarization switching speed of Hf0.5Zr0.5O2 (HZO) film. The presence of charged defects in the film hinders domain propagation and deteriorates the overall speed.
Article
Materials Science, Ceramics
Amei Zhang, Ruiyi Jing, Meng Zhuang, Hongping Hou, Leiyang Zhang, Jie Zhang, Xu Lu, Yangxi Yan, Hongliang Du, Li Jin
Summary: The investigation unveils that the nonstoichiometric effect plays a vital role in determining the morphology, dielectric, ferroelectric, and electrostrain properties of (Bi0.5Na0.5)TiO3 (BNT) ceramics. The variation of x significantly influences these properties, leading to distinctive differences between Na-rich and Bi-rich samples. Additionally, the presence of 1 mol% excess Bi is found to greatly enhance the dielectric, ferroelectric, and electrostrain properties of BNT and BNT-based systems.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Lisa Zhou, Yuanyuan Zhang, Haijuan Zhang, Sheng Li, Jing Yang, Wei Bai, Rong Huang, Ni Zhong, Jie Chen, Xiaodong Tang
Summary: Research found that in ferroelectric films, stronger polarization leads to higher photocurrents and slower photocarrier recombination. Larger ferroelectric polarization in films results in more effective separation of photogenerated electrons and holes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Physics, Applied
Ran Xu, Li Chen, Zhuo Xu, Yujun Feng
Summary: This study investigated the polarization switching of PNZST ferroelectric ceramics in microsecond scale via pulse switching experiment. It was found that the switching current increased with electric field and temperature, while the switching time decreased. The pulse switching dynamic was a current-limiting process that depended on circuit parameters.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Liyan Wu, Aaron M. Burger, Andrew L. Bennett-Jackson, Jonathan E. Spanier, Peter K. Davies
Summary: This study demonstrates an enhancement in photovoltaic performance by engineering the polarization near the morphotropic phase boundary. The findings show a controllable multistate photocurrent and a significant photoresponse across a broad spectral range.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Mao-Hua Zhang, Leif Carstensen, Changhao Zhao, Lovro Fulanovi, Wolfgang Donner, Jurij Koruza
Summary: The study investigates the solid-state synthesis of AgNbO3 and found that ball milling is beneficial for converting AgO into metallic silver, thus reducing the reaction temperature for the formation of the perovskite phase. The influence of processing atmosphere on the functional properties of AFE AgNbO3 was also examined, revealing that AgNbO3 only forms in air and O-2, with faster kinetics observed in the latter case. Despite the need for oxygen uptake in the reaction, a pure O-2 atmosphere is not essential for the synthesis of high-quality AgNbO3.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Biomedical
Pery Freitas, Ryo Kishida, Koichiro Hayashi, Akira Tsuchiya, Masaya Shimabukuro, Kunio Ishikawa
Summary: This study demonstrates the successful fabrication of carbonate apatite (CO3Ap) blocks using a salt leaching method, which were implanted into rabbit femur defects to promote new bone growth. CO3Ap blocks with a pore size of 100-200 μm showed the most effective outcome in bone ingrowth.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2022)
Article
Materials Science, Multidisciplinary
Koichiro Hayashi, Akira Tsuchiya, Masaya Shimabukuro, Kunio Ishikawa
Summary: The use of scaffolds with multiscale pores is an effective strategy for bone regeneration. In this study, multiscale porous scaffolds (MPSs) were fabricated and the effects of macropores and micropores on bone regeneration were evaluated. The results showed that macropores played a crucial role in promoting new bone formation in the early stage, while micropores were the dominant factor affecting the replacement of MPSs with new bone in the medium term. Optimization of pore size distribution is a promising strategy to develop scaffolds that satisfy the requirements of both osteogenesis and mechanical strength.
MATERIALS & DESIGN
(2022)
Article
Biotechnology & Applied Microbiology
Keigo Shibahara, Koichiro Hayashi, Yasuharu Nakashima, Kunio Ishikawa
Summary: The study evaluated the effects of different channel and micropore volumes in carbonate apatite honeycomb (HC) scaffolds on bone reconstruction. Channels were found to affect early bone ingrowth, while micropores affected scaffold resorption and bone formation. Additionally, scaffolds with large volumes of both channels and micropores formed a significantly larger amount of new bone, thereby bridging the host bone stumps.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Biomedical
Koichiro Hayashi, Toshiki Yanagisawa, Masaya Shimabukuro, Ryo Kishida, Kunio Ishikawa
Summary: A productive method for fabricating carbonate apatite honeycomb granules with uniformly sized macropores has been developed. These granules promote the growth of new and mature bone and blood vessels, both internally and externally, after 4 weeks of implantation.
MATERIALS TODAY BIO
(2022)
Review
Chemistry, Physical
Mao-Hua Zhang, Lovro Fulanovic, Changhao Zhao, Jurij Koruza
Summary: The emerging applications of antiferroelectric perovskite oxides have attracted considerable attention due to their fascinating phase transformation. The challenges in defining antiferroelectric materials are discussed, and proposed applications are briefly summarized. The crystallographic structures and field-induced phase transition behavior of NaNbO3-based antiferroelectric materials are examined, along with recent advances in high energy storage performance and relaxor-like behavior. The influence of electrode geometry on phase transition behavior and energy storage property is addressed, and future challenges in understanding the scientific richness of antiferroelectric materials are discussed.
JOURNAL OF MATERIOMICS
(2023)
Article
Engineering, Electrical & Electronic
Omar Ben Dali, Sergey Zhukov, Romol Chadda, Anatoli Kasanski, Heinz von Seggern, Xiaoqing Zhang, Gerhard Martin Sessler, Mario Kupnik
Summary: By replacing the environmentally harmful fluorinated polymer FEP with eco-friendly polylactic acid (PLA), a new manufacturing route is introduced to build an artificial ferroelectret sandwich. The PLA films show promising stability in terms of charge and piezoelectric activity. The easy assembled eco-friendly sensors demonstrate potential applications in force myography with high classification accuracy.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Xingchen Ma, Sergey Zhukov, Heinz von Seggern, Gerhard M. Sessler, Omar Ben Dali, Mario Kupnik, Ying Dai, Pengfei He, Xiaoqing Zhang
Summary: This article reports biodegradable and bioabsorbable ferroelectret films made from polylactic acid (PLA) resins for highly sensitive transducer applications. By modification of the microstructure and polarization, pronounced longitudinal and transverse piezoelectric activities are realized in a single material. The preparation procedure of the PLA ferroelectrets is compatible with large-scale production lines and thus can greatly promote their applications in green electronics.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kasper A. Hunnestad, Jan Schultheiss, Anders C. Mathisen, Ivan N. Ushakov, Constantinos Hatzoglou, Antonius T. J. van Helvoort, Dennis Meier
Summary: Polar discontinuities and compositional/structural changes at oxide interfaces can result in various electronic and ionic phenomena. This study investigates the relationship between polar discontinuities and local chemistry at grain boundaries in polycrystalline ferroelectric ErMnO3. It is found that the polycrystalline material develops charged grain boundaries with enhanced electronic conductance. The observed changes in composition are determined by structural phenomena rather than electrostatics, leading to changes in electronic transport behavior.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Olav W. Sandvik, Aaron Merlin Mueller, Hakon W. Anes, Manuel Zahn, Jiali He, Manfred Fiebig, Thomas Lottermoser, Tadej Rojac, Dennis Meier, Jan Schultheiss
Summary: Mechanical pressure is able to control the structure, electric and magnetic order in solid-state systems, allowing the modification of their physical properties. In this study, we investigate the effect of pressure on a nonferroelastic ferroelectric material, ErMnO3, which is characterized by the absence of classical stress-strain coupling and the formation of domains governed by creation-annihilation processes of topological defects. By annealing ErMnO3 polycrystals under different pressure conditions, we demonstrate the transformation of nonferroelastic vortex-like domains into stripe-like domains, whose width is determined by the applied pressure. This work presents the possibility to utilize mechanical pressure for domain engineering in nonferroelastic ferroelectrics and provides a means to control their dielectric and piezoelectric responses.
Article
Materials Science, Multidisciplinary
Olga Y. Mazur, Leonid I. Stefanovich, Yuri A. Genenko
Summary: A self-consistent stochastic model is developed to investigate the domain structure formation in a uniaxial ferroelectric undergoing a phase transition from a high-temperature paraelectric phase to a low-temperature ferroelectric phase. The model takes into account the applied electric field and the feedback effect through local depolarization fields, considering both polarization and field components as Gauss random variables. Analytical and numerical solutions are derived for the correlation functions of all involved variables, revealing a phase diagram and time-dependent evolution of average polarization and dispersion that exhibit plausible agreement with experimental data.
Article
Chemistry, Multidisciplinary
Kasper A. Hunnestad, Jan Schultheiss, Anders C. Mathisen, Ivan N. Ushakov, Constantinos Hatzoglou, Antonius T. J. van Helvoort, Dennis Meier
Summary: This study investigates the relation between polar discontinuities and the local chemistry at grain boundaries in polycrystalline ferroelectric ErMnO3. The results show that there are compositional changes at grain boundaries that exceed possible polarization-driven effects, indicating that structural phenomena rather than electrostatics determine changes in electronic transport behavior.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vida Jurecic, Lovro Fulanovic, Jurij Koruza, Vid Bobnar, Nikola Novak
Summary: This study demonstrates the existence of two critical end points in antiferroelectric ceramics, and manipulating these end points can improve the functional properties of the materials, paving the way for the next generation of high-energy storage materials.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Biophysics
Cheng Zhang, Koichiro Hayashi, Kunio Ishikawa
Summary: This study investigates the effect of the dispersion state of osteoconductive ceramics (OCs) in implants on osseointegration ability. The findings show that composite implants made of carbonate apatite (CAp) granules with polylactic acid (PLA) exhibit improved bone maturation, higher bone-to-implant contact, and stronger adhesive shear strength compared to implants made with dispersed OC powder. This highlights the importance of the dispersion state of OCs in material development for enhancing osseointegration.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Sonja Egert, Jurij Koruza, Hergen Breitzke, Changhao Zhao, Barbara Malic, Gerd Buntkowsky, Pedro B. Groszewicz
Summary: Lead zirconate (PbZrO3, PZ) is an important oxide material that can be improved by chemical substitutions and design of more environmentally friendly alternatives. Barium substitution leads to lattice expansion and increased lead displacement, facilitating the formation of stronger lead-oxygen bonds. NMR spectroscopy is a valuable method for studying the effect of barium substitution on the materials.
DALTON TRANSACTIONS
(2022)
