Article
Chemistry, Multidisciplinary
Jing Wang, Huayu Yang, Yue Wang, Yuanyuan Fan, Di Liu, Yuben Yang, Jialu Wu, Mingfeng Chen, Rongzhen Gao, Houbing Huang, Xueyun Wang, Jiawang Hong, Jing Ma, Jinxing Zhang, Ce-Wen Nan
Summary: The research findings show that polarization switching in BiFeO3 thin films leads to an increase in abrupt current, especially in (110) and (111) oriented films, due to improved modulation of the interfacial Schottky barrier by enhanced out-of-plane polarization magnitude. In a (111)-oriented BiFeO3 thin film, an on-off ratio exceeding 6 x 10(5)% was achieved at a readout voltage of approximately 3V.
Article
Chemistry, Inorganic & Nuclear
Shutaro Asanuma
Summary: LaCuO3 is a fundamental cuprate perovskite material that has a similar structure to high-temperature superconductors. However, the synthesis of LaCuO3 has been challenging, resulting in limited research on this material. This study demonstrates the successful synthesis of rhombohedral LaCuO3 thin films using an oxidation method with NaClO solution.
DALTON TRANSACTIONS
(2022)
Article
Physics, Applied
Y. L. Tang, Y. L. Zhu, M. J. Zou, Y. J. Wang, X. L. Ma
Summary: By introducing large compressive strains in perovskite BiFeO3 films, giant tetragonality and morphotropic phase boundaries were achieved, leading to large piezoelectric responses. Mechanical bending deformations in R-like BiFeO3 were successfully achieved through neighboring T-like BiFeO3 phases, revealing a strain gradient of approximately 10^(6)/m.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Ceramics
Xu Jiang, Jie Sun, Xiaojie Chai, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study found that the wall current varies with the angle between the applied electric field and the initial polarization, and that the oxygen vacancy concentration can be controlled through thermal annealing, affecting the magnitude of the domain wall current.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Dongfeng Zheng, Guo Tian, Yadong Wang, Wenda Yang, Luyong Zhang, Zoufei Chen, Zhen Fan, Deyang Chen, Zhipeng Hou, Xingsen Gao, Qiliang Li, Jun-Ming Liu
Summary: In this study, the controlled manipulation of conductive domain walls in epitaxial BiFeO3 thin films was demonstrated using piezoresponse force microscopy and conductive atomic force microscopy. It was also found that nanoscale domains surrounded by highly conductive circular charged domain walls can be created and erased through the application of local field using a conductive probe.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Multidisciplinary
Guoqiang Xi, Zhao Pan, Yue-Wen Fang, Jie Tu, Hangren Li, Qianqian Yang, Chen Liu, Huajie Luo, Jiaqi Ding, Shuai Xu, Shiqing Deng, Qingxiao Wang, Dongxing Zheng, Youwen Long, Kuijuan Jin, Xixiang Zhang, Jianjun Tian, Linxing Zhang
Summary: A method of anion-induced polarization rotation with chemical strain is proposed to improve the ferroelectricity of BiFeO3 thin films. The sulfurization of the films leads to a substantial enhancement in room-temperature ferroelectric polarization, increasing the remnant polarization by 170% from 58 to 100.7 μC cm(-2).
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Surbhi Gupta, Madhuparna Pal, Monika Tomar, Ruyan Guo, Amar Bhalla, Vinay Gupta
Summary: The simultaneous presence of ferroelectric and magnetic ordering at room temperature in multiferroics has attracted significant interest for potential applications in low-power sensors, transducers, and memory devices. This study focused on investigating the ferroelectric and magnetic domain mapping of Bi1-XCeXFeO3 thin films, and discussed the concentration-dependent behavior of piezo-response, phase reversal, and magneto-dielectric coupling. The results showed improved ferroelectric ordering in polycrystalline BCFO0.12 thin film, with a large piezo-response amplitude change, near complete phase reversal, and enhanced magneto-dielectric coupling coefficient at 0.3 T.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Ying Yang, Yuelin Zhang, Liang Yang, Jingdi Lu, Gongxun Deng, Yinshu Wang, Hui Zhu, Aiji Wang
Summary: This study demonstrates the three-state resistive switching (RS) phenomenon on a Pt/BiFeO3/SrRuO3 structure. The three-state storage capability is attributed to the movement of oxygen vacancies and the trapping/detrapping of charge carriers at the interface. Additionally, a ternary OR logic gate is designed using only one memristor.
Article
Physics, Condensed Matter
Haoming Wei, Mingxu Wang, Yangqing Wu, Bingqiang Cao
Summary: The effect of substrate on the domain structure and bulk photovoltaic property in BiFeO3 films is reported. It is observed that BiFeO3 films can be epitaxially grown on TbScO3 substrate with a 45 degrees rotation domain. Compared with LaAlO3 substrate, the TbScO3 substrate promotes the formation of periodic 71 degrees ferroelectric domain wall in BiFeO3 films, as demonstrated by piezoelectric force microscopy measurements. Illumination of the BiFeO3 film on TbScO3 substrate by 1 sun AM 1.5 G results in a higher open-circuit voltage of 9.66 V, exceeding the band gap of BiFeO3. These findings contribute to a better understanding of the relationship between domain structure and bulk photovoltaic properties in BiFeO3 films.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Veniero Lenzi, Jose P. B. Silva, Bretislav Smid, Vladimir Matolin, Cosmin M. Istrate, Corneliu Ghica, Judith L. MacManus-Driscoll, Luis Marques
Summary: In this study, it is found that oxygen vacancies in rhombohedral ZrO2 thin films not only stabilize the phase, but also contribute to the ferroelectric polarization. Experimental investigation, coupled with density functional theory calculations, reveals the importance of oxygen vacancies for stabilizing rhombohedral ZrO2 thin films with superior ferroelectric properties.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
David S. Knoche, Matthias Steimecke, Yeseul Yun, Lutz Muehlenbein, Akash Bhatnagar
Summary: This study investigates the evolution of bulk photovoltaic effect in BiFeO3 thin films under different polarization conditions, revealing anomalous characteristics in open-circuit voltages under circularly polarized light. Spatially-resolved Raman measurements further analyze the interaction between light and different domains.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Fei Sun, Deyang Chen, Xingsen Gao, Jun-Ming Liu
Summary: BiFeO3, a single-phase multiferroic material, has various polymorphs and strong sensitivity to strain. Recent interest has been focused on emergent strain engineering in BiFeO3 thin films, using non-traditional methods to create new ground states and functionalities.
JOURNAL OF MATERIOMICS
(2021)
Article
Chemistry, Multidisciplinary
Yuhan Liang, Dingsong Jiang, Yahong Chai, Yue Wang, Hetian Chen, Jing Ma, Pu Yu, Di Yi, Tianxiang Nan
Summary: In this study, we observed magnon spin transport through multiferroic BiFeO3 thin films in a spin pumping experiment at room temperature. The experimental results showed that the magnon spin transport efficiency is very high when the thickness of the BiFeO3 films exceeds 80 nm.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Pamela Machado, Ivan Cano, Cesar Menendez, Claudio Cazorla, Huan Tan, Ignasi Fina, Mariano Campoy-Quiles, Carlos Escudero, Massimo Tallarida, Mariona Coll
Summary: The study investigates the influence of cation co-substitution in BiFeO3 on phase purity, optical and electronic properties through X-ray diffraction, spectroscopic ellipsometry and X-ray absorption spectroscopy. The incorporation of La3+ in Bi(Fe,Co)O-3 films improves phase purity and stability while maintaining the reduced band gap achieved in metastable Bi(Fe,Co)O-3. The changes in optoelectronic properties are mainly attributed to the hybridization between unoccupied Co 3d and O 2p states, and the presence of Co3+/Co2+ species.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Hyun Wook Shin, Jong Yeog Son
Summary: Polycrystalline BiFeO3 (BFO) thin films with mixed c-oriented and a-oriented crystallinity were deposited on a (200) Pt/TiO2/SiO2/Si substrate. The presence of a-domains increased with the thickness of the films. The domain wall currents at the a-domain and c-domain boundaries of the BFO thin films were larger than those at the c-domain boundaries. The formation of a-domains significantly affected the leakage currents, ferroelectric polarizations, and piezoelectric coefficients of the BFO thin films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Y. Jiang, E. Parsonnet, A. Qualls, W. Zhao, S. Susarla, D. Pesquera, A. Dasgupta, M. Acharya, H. Zhang, T. Gosavi, C-C Lin, D. E. Nikonov, H. Li, I. A. Young, R. Ramesh, L. W. Martin
Summary: This article demonstrates high-quality BaTiO3 thin films with nearly bulk-like properties. The scaling of film thickness allows for the access of required coercive voltages and fields for future applications, as well as fast switching speeds and a pathway to subnanosecond switching. Integration of BaTiO3 thin films onto silicon substrates is also shown, with further work discussed.
Article
Multidisciplinary Sciences
Kook Tae Kim, Margaret R. McCarter, Vladimir A. Stoica, Sujit Das, Christoph Klewe, Elizabeth P. Donoway, David M. Burn, Padraic Shafer, Fanny Rodolakis, Mauro A. P. Goncalves, Fernando Gomez-Ortiz, Jorge Iniguez, Pablo Garcia-Fernandez, Javier Junquera, Sandhya Susarla, Stephen W. Lovesey, Gerrit van der Laan, Se Young Park, Lane W. Martin, John W. Freeland, Ramamoorthy Ramesh, Dong Ryeol Lee
Summary: REXS is a unique tool for investigating solid-state systems, providing spatial knowledge and electronic information simultaneously, allowing the probing of magnetic, charge, spin, orbital degrees of spatial order, and electronic structure. The study of polar chiral structures using REXS has emerged as a promising new application, with significant progress made in analyzing experimental results related to polar vortex arrays in PbTiO3/SrTiO3 superlattices.
NATURE COMMUNICATIONS
(2022)
Review
Physics, Condensed Matter
David Pesquera, Abel Fernandez, Ekaterina Khestanova, Lane W. Martin
Summary: Complex oxides exhibit a wide range of functional responses, making them promising for various applications. Recent advancements in the fabrication of complex oxide membranes provide new opportunities for studying and utilizing these materials.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Margaret R. McCarter, Kook Tae Kim, Vladimir A. Stoica, Sujit Das, Christoph Klewe, Elizabeth P. Donoway, David M. Burn, Padraic Shafer, Fanny Rodolakis, Mauro A. P. Goncalves, Fernando Gomez-Ortiz, Jorge Iniguez, Pablo Garcia-Fernandez, Javier Junquera, Stephen W. Lovesey, Gerrit van der Laan, Se Young Park, John W. Freeland, Lane W. Martin, Dong Ryeol Lee, Ramamoorthy Ramesh
Summary: An escalating challenge in condensed-matter research is the characterization of emergent order parameter nanostructures. Resonant elastic x-ray scattering (REXS) has emerged as a technique to study chirality in spin textures, but its application in ferroelectrics is limited. This study presents a framework for modeling REXS from an arbitrary arrangement of charge quadrupole moments and demonstrates its ability to probe the structure and chirality of polar skyrmions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Shuai Yuan, Zuhuang Chen, Sergei Prokhorenko, Yousra Nahas, Laurent Bellaiche, Chenhan Liu, Bin Xu, Lang Chen, Sujit Das, Lane W. Martin
Summary: Using phase-field simulations, the evolution of polar topology and the emergence of a hexagonal close-packed skyrmion lattice in ultrathin ferroelectric PbTiO3 films is explored. The lattice can be stabilized under an external electric field and the lattice constants increase with film thickness. These studies pave the way for the development of novel ordered condensed matter phases in nanoscale ferroelectrics.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Yu-Tsun Shao, Sujit Das, Zijian Hong, Ruijuan Xu, Swathi Chandrika, Fernando Gomez-Ortiz, Pablo Garcia-Fernandez, Long-Qing Chen, Harold Y. Hwang, Javier Junquera, Lane W. Martin, Ramamoorthy Ramesh, David A. Muller
Summary: In this study, the authors investigate the strain-induced transition from skyrmions to merons using electron imaging methods. It is found that strain plays a crucial role in driving the topological phase transition from chiral polar skyrmions to non-chiral merons.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xianlong Cheng, Chao Zhou, Baichen Lin, Zhenni Yang, Shanquan Chen, Kelvin H. L. Zhang, Zuhuang Chen
Summary: Fluorite-structured Hf0.5Zr0.5O2 (HZO) thin films have gained attention for their good CMOS-compatibility and robust ferroelectricity. However, the challenges of high leakage current and poor endurance hinder the application of HZO in microelectronic devices. This study investigates the electric properties of Pt/HZO/La0.7Sr0.3MnO3 (LSMO) heterostructures and finds that the leakage mechanism is dominated by Schottky emission. By post-annealing in oxygen atmosphere, the barrier height can be increased, effectively reducing leakage current and improving endurance.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Eduardo Lupi, Robert B. Wexler, Derek Meyers, Anton Zahradnik, Yizhe Jiang, Sandhya Susarla, Ramamoorthy Ramesh, Lane W. Martin, Andrew M. Rappe
Summary: Complex-oxide superlattices with precise unit-cell structures provide a pathway to various emergent phenomena. In this study, relaxor-like behavior is observed in superlattices of ferroelectric and dielectric materials. The behavior is influenced by the periodicity and shape of the superlattice.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Zishen Tian, Michael Xu, Jieun Kim, Hao Pan, Djamila Lou, Xiaoxi Huang, James M. Lebeau, Lane W. Martin
Summary: Superlattices of [BaTiO3]m/[BaZrO3]n (m, n = 4-12) are used to demonstrate the fabrication and control of an artificial relaxor. Experimental results show the successful production of high-quality heterostructures. The study reveals a transition in the dielectric properties of the materials as the BaTiO3 layer thickness decreases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Jose P. B. Silva, Ruben Alcala, Uygar E. Avci, Nick Barrett, Laura Begon-Lours, Mattias Borg, Seungyong Byun, Sou-Chi Chang, Sang-Wook Cheong, Duk-Hyun Choe, Jean Coignus, Veeresh Deshpande, Athanasios Dimoulas, Catherine Dubourdieu, Ignasi Fina, Hiroshi Funakubo, Laurent Grenouillet, Alexei Gruverman, Jinseong Heo, Michael Hoffmann, H. Alex Hsain, Fei-Ting Huang, Cheol Seong Hwang, Jorge Iniguez, Jacob L. Jones, Ilya V. Karpov, Alfred Kersch, Taegyu Kwon, Suzanne Lancaster, Maximilian Lederer, Younghwan Lee, Patrick D. Lomenzo, Lane W. Martin, Simon Martin, Shinji Migita, Thomas Mikolajick, Beatriz Noheda, Min Hyuk Park, Karin M. Rabe, Sayeef Salahuddin, Florencio Sanchez, Konrad Seidel, Takao Shimizu, Takahisa Shiraishi, Stefan Slesazeck, Akira Toriumi, Hiroshi Uchida, Bertrand Vilquin, Xianghan Xu, Kun Hee Ye, Uwe Schroeder
Summary: Ferroelectric hafnium and zirconium oxides have shown significant progress in ultralow-power electronic systems, but technical limitations still hinder their application. This article aims to provide a comprehensive overview of the current state, challenges, and prospects for the development of these materials, with the collaboration of experts from different fields.
Article
Energy & Fuels
Or Shafir, Andrew L. Bennett-Jackson, Alexandria R. Will-Cole, Atanu Samanta, Dongfang Chen, Adrian Podpirka, Aaron Burger, Liyan Wu, Eduardo Lupi Sosa, Lane W. Martin, Jonathan E. Spanier, Ilya Grinberg
Summary: By tuning fundamental ferroelectric properties, a high BPE photoresponse can be achieved in an ordinary thin-film configuration. The responsivity shows a nonmonotonic dependence on ferroelectric polarization, and at the optimal value, it increases by three orders of magnitude compared to the bulk BaTiO3.
Article
Materials Science, Multidisciplinary
Baichen Lin, Yanyi Zhang, Hongjian Zhang, Haofei Wu, Junda Shao, Jian Shao, Kai Liu, Shanquan Chen, Chao Zhou, Xianlong Cheng, Jingyu Lu, Kailong Hu, Yan Huang, Weiwei Zhao, Pan Liu, Jixin Zhu, Hua-Jun Qiu, Zuhuang Chen
Summary: Two-dimensional (2D) metals have attracted significant attention for their unique properties and potential applications. However, the fabrication of atomically thin 2D metals remains challenging. In this study, we demonstrate a general method to fabricate freestanding, high-quality 2D metals with large aspect ratios and controllable thickness using Pt as a model system.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Roman G. Burkovsky, Georgiy A. Lityagin, Alexander E. Ganzha, Alexander F. Vakulenko, Ran Gao, Arvind Dasgupta, Bin Xu, Alexey Filimonov, Lane W. Martin
Summary: Research on epitaxial antiferroelectric materials show that PbZrO3/SrRuO3/SrTiO3 heterostructures exhibit an unusual structural response to electric fields lower than the switching threshold, gradually forming a ferroelectric-like structure. The field-induced structure is similar to the parent antiferroelectric phase in octahedral-tilt pattern but differs in lead-ion displacement. The findings suggest a potential mechanism for smearing of polarization-field loops in such heterostructures.
Article
Materials Science, Multidisciplinary
Zishen Tian, Jieun Kim, Abel Fernandez, Xiaoxi Huang, Lane W. Martin
Summary: In this study, the impact of epitaxial constraint on the relaxor behavior and properties of thin films with different orientations was investigated. It was found that the orientation of heterostructures has a significant effect on their dielectric performance, while homovalent relaxors are more susceptible to substrate clamping. Additionally, the dielectric anisotropy was found to be lower in heterostructures compared to homovalent relaxors.
Article
Engineering, Electrical & Electronic
Xinyu He, Tao Wang, Xudong Li, Sujit Das, Xingjun Liu, Zuhuang Chen
Summary: Piezoelectric ceramics with high performance and thermal stability are crucial for actuation and sensing applications in harsh environments. However, it is challenging to develop such ceramics due to the trade-off between enhanced piezoelectric response and thermal stability. This study presents a piezoceramic material that exhibits a balanced trade-off near the morphotropic phase boundary (MPB), retaining a high piezoelectric coefficient and well-squared shape hysteresis loop even at high temperatures. The substitution of Sm induces a relaxor behavior in the ceramics, offering great promise for high temperature piezoelectric applications.
ACS APPLIED ELECTRONIC MATERIALS
(2022)