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Ladera A, Kashikar R, Lisenkov S, Ponomareva I. Machine Learning Reveals Memory of the Parent Phases in Ferroelectric Relaxors Ba(Ti1−x$_{1-x}$,Zr
x
)O
3. ADVANCED THEORY AND SIMULATIONS 2023. [DOI: 10.1002/adts.202200690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Adriana Ladera
- Department of Computer Science and Engineering University of South Florida Tampa FL 33620 USA
| | - Ravi Kashikar
- Department of Physics University of South Florida Tampa FL 33620 USA
| | - S. Lisenkov
- Department of Physics University of South Florida Tampa FL 33620 USA
| | - I. Ponomareva
- Department of Physics University of South Florida Tampa FL 33620 USA
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2
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Ma CH, Liao YK, Zheng Y, Zhuang S, Lu SC, Shao PW, Chen JW, Lai YH, Yu P, Hu JM, Huang R, Chu YH. Synthesis of a New Ferroelectric Relaxor Based on a Combination of Antiferroelectric and Paraelectric Systems. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22278-22286. [PMID: 35523210 DOI: 10.1021/acsami.2c02281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Relaxor ferroelectric-based energy storage systems are promising candidates for advanced applications as a result of their fast speed and high energy storage density. In the research field of ferroelectrics and relaxor ferroelectrics, the concept of solid solution is widely adopted to modify the overall properties and acquire superior performance. However, the combination between antiferroelectric and paraelectric materials was less studied and discussed. In this study, paraelectric barium hafnate (BaHfO3) and antiferroelectric lead hafnate (PbHfO3) are selected to demonstrate such a combination. A paraelectric to relaxor ferroelectric, to ferroelectric, and to antiferroelectric transition is observed by varying the composition x in the (Ba1-xPbx)HfO3 solid solution from 0 to 100%. It is noteworthy that ferroelectric phases can be realized without primal ferroelectric material. This study creates an original solid solution system with a rich spectrum of competing phases and demonstrates an approach to design relaxor ferroelectrics for energy storage applications and beyond.
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Affiliation(s)
- Chun-Hao Ma
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yi-Kai Liao
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yunzhe Zheng
- Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, Shanghai 200241, People's Republic of China
| | - Shihao Zhuang
- Department of Materials Science and Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Si-Cheng Lu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - Pao-Wen Shao
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Jia-Wei Chen
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yu-Hong Lai
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Pu Yu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - Jia-Mian Hu
- Department of Materials Science and Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Rong Huang
- Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, Shanghai 200241, People's Republic of China
| | - Ying-Hao Chu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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3
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Park J, Lim YW, Cho SY, Byun M, Park KI, Lee HE, Bu SD, Lee KT, Wang Q, Jeong CK. Ferroelectric Polymer Nanofibers Reminiscent of Morphotropic Phase Boundary Behavior for Improved Piezoelectric Energy Harvesting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104472. [PMID: 35187776 DOI: 10.1002/smll.202104472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Ferroelectric and piezoelectric polymers have attracted great attention from many research and engineering fields due to its mechanical robustness and flexibility as well as cost-effectiveness and easy processibility. Nevertheless, the electrical performance of piezoelectric polymers is very hard to reach that of piezoelectric ceramics basically and physically, even in the case of the representative ferroelectric polymer, poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)). Very recently, the concept for the morphotropic phase boundary (MPB), which has been exclusive in the field of high-performance piezoelectric ceramics, has been surprisingly confirmed in P(VDF-TrFE) piezoelectric copolymers by the groups. This study demonstrates the exceptional behaviors reminiscent of MPB and relaxor ferroelectrics in the feature of widely utilized electrospun P(VDF-TrFE) nanofibers. Consequently, an energy harvesting device that exceeds the performance limitation of the existing P(VDF-TrFE) materials is developed. Even the unpoled MPB-based P(VDF-TrFE) nanofibers show higher output than the electrically poled normal P(VDF-TrFE) nanofibers. This study is the first step toward the manufacture of a new generation of piezoelectric polymers with practical applications.
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Affiliation(s)
- Jiseul Park
- Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Yeong-Won Lim
- Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
- Department of Energy Storage/Conversion Engineering of Graduate School, and Hydrogen & Fuel Cell Research Center, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Sam Yeon Cho
- Department of Physics, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University, Daegu, 42601, Republic of Korea
| | - Kwi-Il Park
- School of Materials Science and Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Han Eol Lee
- Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Sang Don Bu
- Department of Physics, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Ki-Tae Lee
- Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
- Department of Energy Storage/Conversion Engineering of Graduate School, and Hydrogen & Fuel Cell Research Center, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Qing Wang
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Chang Kyu Jeong
- Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
- Department of Energy Storage/Conversion Engineering of Graduate School, and Hydrogen & Fuel Cell Research Center, Jeonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
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Abalmasov VA. Dipole ordering of water molecules in cordierite: Monte Carlo simulations. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:34LT01. [PMID: 34062519 DOI: 10.1088/1361-648x/ac06f0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
Electric dipoles of water molecules, enclosed singly in regularly spaced nanopores of a cordierite crystal, become ordered at low temperature due to their mutual interaction and show the frequency dependence of their dielectric susceptibility, typical for relaxor ferroelectrics, according to recent experimental data. The corresponding phase transition is accompanied by anomalies in thermodynamic quantities, such as heat capacity and dielectric susceptibility, which are calculated here using the Monte Carlo method, and their agreement with the experimental data is discussed. Despite the increase in the correlation length, the partially filled dipole lattice at low temperatures, according to the calculations, does not have long-range order and corresponds to a dipole glass. This simulation gives a microscopical insight into the formation of polar nanoregions in relaxor ferroelectrics and the temperature dependence of their size.
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Bersuker IB. Jahn–Teller and Pseudo-Jahn–Teller Effects: From Particular Features to General Tools in Exploring Molecular and Solid State Properties. Chem Rev 2020; 121:1463-1512. [DOI: 10.1021/acs.chemrev.0c00718] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Isaac B. Bersuker
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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6
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Perovskite Crystals: Unique Pseudo-Jahn–Teller Origin of Ferroelectricity, Multiferroicity, Permittivity, Flexoelectricity, and Polar Nanoregions. CONDENSED MATTER 2020. [DOI: 10.3390/condmat5040068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In a semi-review paper, we show that the local pseudo-Jahn–Teller effect (PJTE) in transition metal B ion center of ABO3 perovskite crystals, notably BaTiO3, is the basis of all their main properties. The vibronic coupling between the ground and excited electronic states of the local BO6 center results in dipolar distortions, leading to an eight-well adiabatic potential energy surface with local tunneling or over-the-barrier transitions between them. The intercenter interaction between these dipolar dynamic units results in the formation of the temperature-dependent three ferroelectric and one paraelectric phases with order–disorder phase transitions. The local PJTE dipolar distortion is subject to the presence of sufficiently close in energy local electronic states with opposite parity but the same spin multiplicity, thus limiting the electronic structure and spin of the B(dn) ions that can trigger ferroelectricity. This allowed us to formulate the necessary conditions for the transition metal perovskites to possess both ferroelectric and magnetic (multiferroic) properties simultaneously. It clarifies the role of spin in the spontaneous polarization. We also show that the interaction between the independently rotating dipoles in the paraelectric phase may lead to a self-assembly process resulting in polar nanoregions and relaxor properties. Exploring interactions of PJTE ferroelectrics with external perturbations, we revealed a completely novel property—orientational polarization in solids—a phenomenon first noticed by P. Debye in 1912 as a possibility, which was never found till now. The hindered rotation of the local dipole moments and their ordering along an external field is qualitatively similar to the behavior of polar molecules in liquids, thus adding a new dimension to the properties of solids—notably, the perovskite ferroelectrics. We estimated the contribution of the orientational polarization to the permittivity and flexoelectricity of perovskite crystals in different limiting conditions.
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Xie N, Zhang J, Raza S, Zhang N, Chen X, Wang D. Generation of low-symmetry perovskite structures for ab initiocomputation. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:315901. [PMID: 32163934 DOI: 10.1088/1361-648x/ab7f6a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 03/12/2020] [Indexed: 06/10/2023]
Abstract
Ion displacements are the fundamental cause of ferroelectricity in perovskites. By properly shifting ions,ab initiocomputations have been extensively used to investigate the properties of perovskites in various structural phases. In addition to the relatively simple ion displacements, perovskites have another type of structural distortion known as antiferrodistortion or oxygen octahedron tilting. The interplay between these two types of distortions have generated abundant structural phases that can be tedious to prepare forab initiocomputation, especially for large supercells. Here, we design and implement a computer program to facilitate the generation of distorted perovskite structures, which can be readily used forab initiocomputation to gain further insight into the perovskite of a given structural phase.
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Affiliation(s)
- N Xie
- School of Microelectronics & State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - J Zhang
- School of Microelectronics & State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - S Raza
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong Special Administrative Region, People's Republic of China
| | - N Zhang
- Electronic Materials Research Laboratory-Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - X Chen
- Department of Applied Physics, Aalto University, Espoo 00076, Finland
- BroadBit Batteries Oy, Espoo 02150, Finland
| | - D Wang
- School of Microelectronics & State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
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8
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Abstract
Relaxor-ferroelectrics are fascinating and useful materials, but the mechanism of relaxor-ferroelectricity has been puzzling the scientific community for more than 65 years. Here, a theory of relaxor-ferroelectricity is presented based on 3-dimensional-extended-random-site-Ising-model along with Glauber-dynamics of pseudospins. We propose a new mean-field of pseudospin-strings to solve this kinetic model. The theoretical results show that, with decreasing pseudospin concentration, there are evolutions from normal-ferroelectrics to relaxor-ferroelectrics to paraelectrics, especially indicating by the crossovers from, (a) the sharp to diffuse change at the phase-transition temperature to disappearance in the whole temperature range of order-parameter, and (b) the power-law to Vogel-Fulcher-law to Arrhenius-relation of the average relaxation time. Particularly, the calculated local-order-parameter of the relaxor-ferroelectrics gives the polar-nano-regions appearing far above the diffuse-phase-transition and shows the quasi-fractal characteristic near and below the transition temperature. We also provide a new mechanism of Burns-transformation which stems from not only the polar-nano-regions but also the correlation-function between pseudospins, and put forward a definition of the canonical relaxor-ferroelectrics. The theory accounts for the main facts of relaxor-ferroelectricity, and in addition gives a good quantitative agreement with the experimental results of the order-parameter, specific-heat, high-frequency permittivity, and Burns-transformation of lead magnesium niobate, the canonical relaxor-ferroelectric.
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Liu Y, Han Z, Xu W, Haibibu A, Wang Q. Composition-Dependent Dielectric Properties of Poly(vinylidene fluoride-trifluoroethylene)s Near the Morphotropic Phase Boundary. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01403] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yang Liu
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 United States
| | - Zhubing Han
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 United States
| | - Wenhan Xu
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 United States
| | - Aziguli Haibibu
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 United States
| | - Qing Wang
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 United States
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10
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Liu J, Jin L, Jiang Z, Liu L, Himanen L, Wei J, Zhang N, Wang D, Jia CL. Understanding doped perovskite ferroelectrics with defective dipole model. J Chem Phys 2018; 149:244122. [DOI: 10.1063/1.5051703] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. Liu
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - L. Jin
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Z. Jiang
- School of Microelectronics and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
| | - L. Liu
- College of Materials Science and Engineering, Guilin Univeristy of Technology, Guilin 541004, China
| | - L. Himanen
- Department of Applied Physics, Aalto University, Espoo 00076, Finland
| | - J. Wei
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - N. Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - D. Wang
- School of Microelectronics and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
| | - C.-L. Jia
- School of Microelectronics and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
- Peter Grünberg Institute and Ernst Ruska Center for Microscopy and Spectroscopy with Electrons, Research Center Jülich, D-52425 Jülich, Germany
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Pramanick A, Dmowski W, Egami T, Budisuharto AS, Weyland F, Novak N, Christianson AD, Borreguero JM, Abernathy DL, Jørgensen MRV. Stabilization of Polar Nanoregions in Pb-free Ferroelectrics. PHYSICAL REVIEW LETTERS 2018; 120:207603. [PMID: 29864364 DOI: 10.1103/physrevlett.120.207603] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 02/07/2018] [Indexed: 06/08/2023]
Abstract
The formation of polar nanoregions through solid-solution additions is known to enhance significantly the functional properties of ferroelectric materials. Despite considerable progress in characterizing the microscopic behavior of polar nanoregions (PNR), understanding their real-space atomic structure and dynamics of their formation remains a considerable challenge. Here, using the method of dynamic pair distribution function, we provide direct insights into the role of solid-solution additions towards the stabilization of polar nanoregions in the Pb-free ferroelectric of Ba(Zr,Ti)O_{3}. It is shown that for an optimum level of substitution of Ti by larger Zr ions, the dynamics of atomic displacements for ferroelectric polarization are slowed sufficiently below THz frequencies, which leads to increased local correlation among dipoles within PNRs. The dynamic pair distribution function technique demonstrates a unique capability to obtain insights into locally correlated atomic dynamics in disordered materials, including new Pb-free ferroelectrics, which is necessary to understand and control their functional properties.
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Affiliation(s)
- A Pramanick
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong SAR
| | - W Dmowski
- Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Materials Science and Engineering, University of Tennessee, Oak Ridge, Tennessee 37831, USA
| | - T Egami
- Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Materials Science and Engineering, University of Tennessee, Oak Ridge, Tennessee 37831, USA
| | - A Setiadi Budisuharto
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong SAR
| | - F Weyland
- Institute of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - N Novak
- Institute of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - A D Christianson
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J M Borreguero
- Neutron Data Analysis and Visualization Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D L Abernathy
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M R V Jørgensen
- Center for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, 8000 Aarhus C, Denmark
- MAX IV Laboratory, Lund University, SE-221 00 Lund, Sweden
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Li L, Yang Y, Zhang D, Ye ZG, Jesse S, Kalinin SV, Vasudevan RK. Machine learning-enabled identification of material phase transitions based on experimental data: Exploring collective dynamics in ferroelectric relaxors. SCIENCE ADVANCES 2018; 4:eaap8672. [PMID: 29670940 PMCID: PMC5903900 DOI: 10.1126/sciadv.aap8672] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 02/12/2018] [Indexed: 05/14/2023]
Abstract
Exploration of phase transitions and construction of associated phase diagrams are of fundamental importance for condensed matter physics and materials science alike, and remain the focus of extensive research for both theoretical and experimental studies. For the latter, comprehensive studies involving scattering, thermodynamics, and modeling are typically required. We present a new approach to data mining multiple realizations of collective dynamics, measured through piezoelectric relaxation studies, to identify the onset of a structural phase transition in nanometer-scale volumes, that is, the probed volume of an atomic force microscope tip. Machine learning is used to analyze the multidimensional data sets describing relaxation to voltage and thermal stimuli, producing the temperature-bias phase diagram for a relaxor crystal without the need to measure (or know) the order parameter. The suitability of the approach to determine the phase diagram is shown with simulations based on a two-dimensional Ising model. These results indicate that machine learning approaches can be used to determine phase transitions in ferroelectrics, providing a general, statistically significant, and robust approach toward determining the presence of critical regimes and phase boundaries.
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Affiliation(s)
- Linglong Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Yaodong Yang
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Dawei Zhang
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Zuo-Guang Ye
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Stephen Jesse
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Sergei V. Kalinin
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Corresponding author. (S.V.K.); (R.K.V.)
| | - Rama K. Vasudevan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Corresponding author. (S.V.K.); (R.K.V.)
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13
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Zhang X, He S, Zhao Z, Wu P, Wang X, Liu H. Abnormal optical anisotropy in correlated disorder KTa 1-xNb xO 3:Cu with refractive index gradient. Sci Rep 2018; 8:2892. [PMID: 29440722 PMCID: PMC5811597 DOI: 10.1038/s41598-018-20756-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/23/2018] [Indexed: 11/09/2022] Open
Abstract
In this report, an abnormal optical anisotropy in KTa1-xNbxO3:Cu (Cu:KTN) crystals with refractive index gradient is presented. Contrary to general regulation in a cross-polarization setup, the transmitted intensity of both TE (horizontally polarized) and TM (vertically polarized) lasers aligned with the basic crystallographic directions can be modulated quasiperiodically. The mechanism is supposed to be based on the polarization induced by the temperature gradient and the refractive index gradient. Meanwhile, the correlated disorder property of the crystals in the range of the freezing temperature (Tf) and the intermediate temperature (T *) also plays an important role. With the results verified both theoretically and experimentally, we believe this work is not only beneficial for the development of the theory associated with the correlated disorder structures in relaxor ferroelectrics, but also significant for the exploitation of numerous optical functional devices.
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Affiliation(s)
- Xin Zhang
- Institute of Modern Optics, Nankai University, Tianjin, 300071, China
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin, 300071, China
| | - Shan He
- Institute of Modern Optics, Nankai University, Tianjin, 300071, China
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin, 300071, China
| | - Zhuan Zhao
- Institute of Modern Optics, Nankai University, Tianjin, 300071, China
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin, 300071, China
| | - Pengfei Wu
- Institute of Modern Optics, Nankai University, Tianjin, 300071, China.
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin, 300071, China.
| | - Xuping Wang
- Advanced Materials Institute, Shandong Academy of Sciences, Jinan, 250014, China.
| | - Hongliang Liu
- Institute of Modern Optics, Nankai University, Tianjin, 300071, China.
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin, 300071, China.
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14
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Electrical terahertz modulator based on photo-excited ferroelectric superlattice. Sci Rep 2018; 8:2682. [PMID: 29422668 PMCID: PMC5805752 DOI: 10.1038/s41598-018-21095-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/29/2018] [Indexed: 11/14/2022] Open
Abstract
The transmission and dielectric spectra of ferroelectric STO/PT superlattice on Si substrate under simultaneous external optical and electric field were investigated and compared at room temperature. Results found that when with an optical field, the electric field realized an effective modulation on the transmission, which displayed a diode property. In addition, a comprehensive model combined with Debye relaxation and Lorentz model was used to analyze the dielectric spectra, variation of the soft mode with external field was put emphasis on exploring.
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15
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Salehizadeh SA, Chenari HM, Shabani M, Ahangar HA, Zamiri R, Rebelo A, Kumar JS, Graça MPF, Ferreira JMF. Structural and impedance spectroscopy characteristics of BaCO3/BaSnO3/SnO2 nanocomposite: observation of a non-monotonic relaxation behavior. RSC Adv 2018; 8:2100-2108. [PMID: 35542591 PMCID: PMC9077235 DOI: 10.1039/c7ra12442b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 01/03/2018] [Indexed: 11/25/2022] Open
Abstract
A BaCO3/BaSnO3/SnO2 nanocomposite has been prepared using a co-precipitation method without adding any additives. The prepared sample was characterized by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, energy dispersive X-ray spectroscopy (EDS) and Raman spectroscopy. Detailed studies on the dielectric and electrical behavior (dielectric constant, complex impedance Z*, ac conductivity, and relaxation mechanisms) of the nanocomposite have been performed using the nondestructive complex impedance spectroscopy technique within the temperature range 150–400 K. The dielectric constant of the sample as a function of temperature showed the typical characteristics of a relaxor. The maximum dielectric constant value was observed to depend on frequency. The non-monotonic relaxation behavior of the prepared nanocomposite was evidenced from the spectra of loss tan, tan(δ). The relaxation kinetics was modeled using a non-Arrhenius model. A BaCO3/BaSnO3/SnO2 nanocomposite has been prepared using a co-precipitation method without adding any additives.![]()
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Affiliation(s)
- S. A. Salehizadeh
- Physics Department (I3N)
- University of Aveiro
- Campus Universitario de Santiago
- Aveiro
- Portugal
| | | | - Mehdi Shabani
- Department of Materials and Ceramic Engineering (DEMaC)
- University of Aveiro
- Aveiro
- 3810-193 Portugal
- Sustainable Developments in Civil Engineering Research Group (SDCE)
| | | | - Reza Zamiri
- Laser Applications Research Group
- Ton Duc Thang University
- Ho Chi Minh City
- Vietnam
- Faculty of Applied Sciences
| | - Avito Rebelo
- Department of Materials and Ceramic Engineering (DEMaC)
- University of Aveiro
- Aveiro
- 3810-193 Portugal
| | - J. Suresh Kumar
- Physics Department (I3N)
- University of Aveiro
- Campus Universitario de Santiago
- Aveiro
- Portugal
| | - M. P. F. Graça
- Physics Department (I3N)
- University of Aveiro
- Campus Universitario de Santiago
- Aveiro
- Portugal
| | - J. M. F. Ferreira
- Department of Materials and Ceramic Engineering (DEMaC)
- University of Aveiro
- Aveiro
- 3810-193 Portugal
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16
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Jiang Z, Nahas Y, Xu B, Prosandeev S, Wang D, Bellaiche L. Special quasirandom structures for perovskite solid solutions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:475901. [PMID: 27661191 DOI: 10.1088/0953-8984/28/47/475901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Special quasirandom structures (SQS) are presently generated for disordered (A'1-x [Formula: see text] x )BX3 and A(B'1-x [Formula: see text] x )X3 perovskite solid solutions, with x = 1/2 as well as 1/3 and 2/3. These SQS configurations are obtained by imposing that the so-called Cowley parameters are as close to zero as possible for the three nearest neighboring shells. Moreover, these SQS configurations are slightly larger in size than those available in the literature for x = 1/2, mostly because of the current capabilities of atomistic techniques. They are used here within effective Hamiltonian schemes to predict various properties, which are then compared to those associated with large random supercells, in a variety of compounds, namely (Ba1-x Sr x )TiO3, Pb(Zr1-x Ti x )O3, Pb(Sc0.5Nb0.5)O3, Ba(Zr1-x Ti x )O3, Pb(Mg1/3Nb2/3)O3 and (Bi1-x Nd x )FeO3. It is found that these SQS configurations can reproduce many properties of large random supercells of most of these disordered perovskite alloys, below some finite material-dependent temperature. Examples of these properties are electrical polarization, anti-phase and in-phase octahedral tiltings, antipolar motions, antiferromagnetism, strain, piezoelectric coefficients, dielectric response, specific heat and even the formation of polar nanoregions (PNRs) in some relaxors. Some limitations of these SQS configurations are also pointed out and explained.
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Affiliation(s)
- Zhijun Jiang
- School of Electronic and Information Engineering & State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China. Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR 72701, USA
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17
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Geneste G, Bellaiche L, Kiat JM. Simulating the Radio-Frequency Dielectric Response of Relaxor Ferroelectrics: Combination of Coarse-Grained Hamiltonians and Kinetic Monte Carlo Simulations. PHYSICAL REVIEW LETTERS 2016; 116:247601. [PMID: 27367408 DOI: 10.1103/physrevlett.116.247601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Indexed: 06/06/2023]
Abstract
The radio-frequency dielectric response of the lead-free Ba(Zr_{0.5}Ti_{0.5})O_{3} relaxor ferroelectric is simulated using a coarse-grained Hamiltonian. This concept, taken from real-space renormalization group theories, allows us to depict the collective behavior of correlated local modes gathered in blocks. Free-energy barriers for their thermally activated collective hopping are deduced from this ab initio-based approach, and used as input data for kinetic Monte Carlo simulations. The resulting numerical scheme allows us to simulate the dielectric response for external field frequencies ranging from kHz up to a few tens of MHz for the first time and to demonstrate, e.g., that local (electric or elastic) random fields lead to the dielectric relaxation in the radio-frequency range that has been observed in relaxors.
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Affiliation(s)
| | - L Bellaiche
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - Jean-Michel Kiat
- Laboratoire Structures, Propriétés et Modélisation des Solides, Université Paris Saclay, CentraleSupélec, CNRS (UMR 8580), Grande Voie des Vignes, 92295 Châtenay-Malabry, France
- LLB, CEA, CNRS, Université Paris-Saclay 91191 Gif-sur-Yvette, France
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