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Hossain KM, Rubel MHK, Hossain MK, Ishraque Toki GF, Marasamy L, Haldhar R, Ali MH, Baruah S, A. Alothman A, Mohammad S. Hydrothermal Synthesis, Phase Analysis, and Magneto-Electronic Characterizations of Lead-Free Ferroelectric BM 2+(Zn, Ca, Mg)T-BFO System. ACS OMEGA 2024; 9:9147-9160. [PMID: 38434879 PMCID: PMC10905731 DOI: 10.1021/acsomega.3c08072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 12/22/2023] [Accepted: 01/24/2024] [Indexed: 03/05/2024]
Abstract
In this study, lead-free BiM2+(Zn, Ca, Mg)Ti-BiFeO3 ceramics are fabricated under eco-friendly hydrothermal reaction conditions at 250 °C. XRD patterns show that all the synthesized compounds exhibit a phase coexistence of monoclinic and tetragonal perovskite-type structures with a morphotropic phase boundary at x = 0.4, with minimum impurity. The calculated average crystallite/grain size of the samples was close to 50 nm at full width at half-maximum of the main peak. The corresponding bonds of the constituent elements were observed by FTIR analysis, which further supports the formation of the local structure. EDS analyses detect all of the elements, their quantities, and compositional homogeneity. SEM data show agglomerated and nearly spherical morphology with an average particle size of about 128 nm. All synthesized ceramic powders revealed thermal stability with trivial mass loss up to investigated high temperatures (1000 οC). The dielectric constant reached its maximum at 38.7 MHz and finally remained constant after 80 MHz for all nanoceramics. Because of the complementary impact of different compositions, the most effective piezoelectric characteristics of d33 = 136 pCN-1, Pr = 8.6 pCN-1 cm-2, and kp = 11% at 30 °C were attained at x = 0.4 content for 0.4BiCaTi-0.6BiFeO3 ceramic. The measured magnetic hysteresis data (M-H curve) showed a weak ferromagnetic nature with the highest moment of ∼0.23 emu/g for 0.4BiCaTi-0.6BiFeO3, and other samples exhibited negligible ferromagnetic to diamagnetic transition. The optical response study shows that the 0.4BiMgTi-0.6BiFeO3 sample yielded the maximal transmittance (50%), whereas the 0.4BiCaTi-0.6BiFeO3 compound exhibited the highest refractive index. The calculated large band gap shows a high insulating or dielectric nature. Our findings demonstrate that the BiM2+Ti-BiFeO3 system, which was fabricated using a low-temperature hydrothermal technique, is an excellent lead-free piezoelectric and multiferroic nanoceramic.
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Affiliation(s)
- K. Monower Hossain
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | - M. H. Kabir Rubel
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | - M. Khalid Hossain
- Institute
of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Dhaka 1349, Bangladesh
- Department
of Advanced Energy Engineering Science, Interdisciplinary Graduate
School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
| | - G. F. Ishraque Toki
- College
of Materials Science and Engineering, Donghua
University, Shanghai 201620, China
| | - Latha Marasamy
- Facultad
de Química, Materiales-Energía, Universidad Autónoma de Querétaro, Santiago de Querétaro, Querétaro C.P.76010, Mexico
| | - Rajesh Haldhar
- School of
Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Md Hasan Ali
- Department
of Electrical and Electronic Engineering, Begum Rokeya University, Rangpur 5400, Bangladesh
| | - Smriti Baruah
- Department
of ECE, Madanapalle Institute of Technology
& Science, Madanapalle 517325, India
| | - Asma A. Alothman
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Saikh Mohammad
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
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Sahoo S, Pradhan DK, Kumari S, Samantaray KS, Singh C, Mishra A, Rahaman MM, Behera B, Kumar A, Thomas R, Rack PD, Pradhan DK. Compositional induced structural phase transitions in (1 - x)(K 0.5Na 0.5)NbO 3-x(Ba 0.5Sr 0.5)TiO 3 ferroelectric solid solutions. Sci Rep 2023; 13:19096. [PMID: 37925566 PMCID: PMC10625606 DOI: 10.1038/s41598-023-45713-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 10/23/2023] [Indexed: 11/06/2023] Open
Abstract
Ferroelectric materials exhibiting switchable and spontaneous polarization have strong potential to be utilized in various novel electronic devices. Solid solutions of different perovskite structures induce the coexistence of various phases and enhance the physical functionalities around the phase coexistence region. The construction of phase diagrams is important as they describe the material properties, which are linked to the underpinning physics determining the system. Here we present the phase diagram of (K0.5Na0.5NbO3)-(Ba0.5Sr0.5TiO3) (KNN-BST) system as a function of composition and their associated physical properties. Lead-free (1 - x)KNN-xBST (0 ≤ x ≤ 0.3) solid solution ceramics were synthesized by conventional solid-state reaction technique. The X-ray diffraction and Raman spectroscopic studies indicate composition-dependent structural phase transitions from an orthorhombic phase for x = 0 to orthorhombic + tetragonal dual-phase (for 0.025 ≤ x ≤ 0.15), then a tetragonal + cubic dual-phase (x = 0.2) and finally a cubic single phase for x ≥ 0.25 at room temperature (RT). Among these, the orthorhombic + tetragonal dual-phase system shows an enhanced value of the dielectric constant at room temperature. The phase transition temperatures, orthorhombic to tetragonal (TO-T) and tetragonal to cubic (TC), decrease with the increase in BST concentrations. The ferroelectric studies show a decrease of both 2Pr and EC values with a rise in BST concentration and x = 0.025 showed a maximum piezoelectric coefficient.
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Affiliation(s)
- Satyaranjan Sahoo
- Department of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India
| | - Dhiren K Pradhan
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Shalini Kumari
- Department of Materials Science & Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | | | - Charanjeet Singh
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Anupam Mishra
- Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, India
| | - Md Mijanur Rahaman
- Department of Materials Science and Engineering, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Banarji Behera
- School of Physics, Sambalpur University, Jyoti Vihar, Burla, 768019, India
| | - Ashok Kumar
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Reji Thomas
- Division of Research and Development, Lovely Professional University, Jalandhar-Delhi G.T. Road, Phagwara, Punjab, 144411, India
- School of Chemical Engineering and Physical Sciences, Lovely Professional University, Jalandhar-Delhi G.T. Road, Phagwara, Punjab, 144411, India
| | - Philip D Rack
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Dillip K Pradhan
- Department of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India.
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Falsi L, Macis S, Gelkop Y, Tartara L, Bonaventura E, Di Pietro P, Perucchi A, Garcia Y, Perepelitsa G, DelRe E, Agranat AJ, Lupi S. Anomalous Optical Properties of KTN:Li Ferroelectric Supercrystals. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:899. [PMID: 36903777 PMCID: PMC10005727 DOI: 10.3390/nano13050899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/10/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
We report a spectroscopic investigation of potassium-lithium-tantalate-niobate (KTN:Li) across its room-temperature ferroelectric phase transition, when the sample manifests a supercrystal phase. Reflection and transmission results indicate an unexpected temperature-dependent enhancement of average index of refraction from 450 nm to 1100 nm, with no appreciable accompanying increase in absorption. Second-harmonic generation and phase-contrast imaging indicate that the enhancement is correlated to ferroelectric domains and highly localized at the supercrystal lattice sites. Implementing a two-component effective medium model, the response of each lattice site is found to be compatible with giant broadband refraction.
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Affiliation(s)
- Ludovica Falsi
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Salvatore Macis
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Yehonatan Gelkop
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Luca Tartara
- Dipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, 27100 Pavia, Italy
| | | | - Paola Di Pietro
- Elettra—Sincrotrone Trieste S.C.p.A. S.S.14, Km 163.5 in AREA Science Park IT-34149 Basovizza, 34100 Trieste, Italy
| | - Andrea Perucchi
- Elettra—Sincrotrone Trieste S.C.p.A. S.S.14, Km 163.5 in AREA Science Park IT-34149 Basovizza, 34100 Trieste, Italy
| | - Yehudit Garcia
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Galina Perepelitsa
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Eugenio DelRe
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
- ISC-CNR, Università di Roma “La Sapienza”, 00185 Rome, Italy
| | - Aharon J. Agranat
- The Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Stefano Lupi
- Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185 Rome, Italy
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Rahaman MM, Kojima S. Brillouin Scattering Study of Electro-Optic KTa 1-xNb xO 3 Crystals. MATERIALS (BASEL, SWITZERLAND) 2023; 16:652. [PMID: 36676389 PMCID: PMC9865914 DOI: 10.3390/ma16020652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/28/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The functionality enhancement of ferroelectrics by local polar clusters called polar nanoregions (PNRs) is one of the current interests in materials science. KTa1-xNbxO3 (KTN) with perovskite structure is a well-known electro-optic crystal with a large Kerr effect. The existence of PNRs in relaxor-like ferroelectric Nb-rich KTN with homovalent B-site cations is controversial. This paper reviews recent progress in understanding precursor dynamics in Nb-rich KTN crystals studied using Brillouin scattering. The intense central peak (CP) and significant softening of sound velocity are observed above the Curie temperature (TC) due to the polarization fluctuations in PNRs. The effects of Li-doping, defects, and electric fields on the growth and/or creation of PNRs are found using changes in acoustic properties. The electric-field-induced TC, which is shifted to higher values with increases in applied voltage, including critical endpoint (CEP) and field gradient by trapped electrons, are discussed as well. This new knowledge may give new insight into advanced functionality in perovskite ferroelectrics.
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Affiliation(s)
- Md. Mijanur Rahaman
- Department of Materials Science and Engineering, University of Rajshahi, Rajshahi 6205, Bangladesh
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8573, Japan
| | - Seiji Kojima
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8573, Japan
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5
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Derets NK, Fedoseev AI, Ko JH, Kojima S, Lushnikov SG. Quasielastic Light Scattering in the Broadband Brillouin Spectra of Relaxor Ferroelectric PbMg 1/3Nb 2/3O 3. MATERIALS (BASEL, SWITZERLAND) 2022; 16:346. [PMID: 36614685 PMCID: PMC9822410 DOI: 10.3390/ma16010346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
In this paper, the behavior of quasielastic light scattering (QELS) in a PbMg1/3Nb2/3O3 (PMN) crystal under broadband Brillouin light scattering in a temperature range from 750 K to 80 K was studied. It was shown that QELS consists of two components: narrow (0.9 GHz to 11 GHz) and wide (80 GHz to 600 GHz). The dependencies of the intensity, I, of these components on the frequency, ν, are well described by the power law I ~ eνα, with different α, and are determined by the distribution of the relaxation times. The analysis of the Brillouin spectra showed that the behavior of the relaxation time of both the components of QELS with temperature change is well described by the Arrhenius law. Additionally, in the vicinity of the intermediate temperature T* ≈ 380 K, a critical relaxation time behavior for the narrow component of QELS was detected. In the vicinity of the same temperature, a maximum in the integral intensity of both the components of QELS was observed, which is adjacent to another maximum in the region of the Vogel-Fulcher temperature TVF ≈ 250 K corresponding to the transformation of the crystal to a nonergodic state.
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Affiliation(s)
- Nikita K. Derets
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
| | - Alexander I. Fedoseev
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
| | - Jae-Hyeon Ko
- School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University, 1 Hallymdaehakgil, Chuncheon 24252, Gangwondo, Republic of Korea
| | - Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Ibaraki, Japan
| | - Sergey G. Lushnikov
- Division of Physics of Dielectrics and Semiconductors, Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia
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Rahaman MM, Hossain KM, Rubel MHK, Islam AKMA, Kojima S. Alkaline-Earth Metal Effects on Physical Properties of Ferromagnetic AVO 3 (A = Ba, Sr, Ca, and Mg): Density Functional Theory Insights. ACS OMEGA 2022; 7:20914-20926. [PMID: 35755384 PMCID: PMC9219064 DOI: 10.1021/acsomega.2c01630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
The effects of alkaline-earth metals on electronic, optical, thermodynamic, and physical properties of ferromagnetic AVO3 (A = Ba, Sr, Ca, and Mg) have been investigated by first-principles calculations within the GGA+U formalism based on density functional theory. The optimized structural parameters are in good agreement with the available experimental results that evaluate the reliability of our calculations. The cell and mechanical stability is discussed using the formation energy and Born stability criteria, respectively. The mechanical behaviors of AVO3 are discussed on the basis of the results of elastic constants, elastic moduli, Peierls stress, and Vickers hardness. The nature of the ductile-brittle transition of AVO3 compounds was confirmed by the values of Pugh's ratio, Poisson's ratio, and Cauchy pressure. The electronic band structures, as well as density of states, reveal the half-metallic behavior of BaVO3 and SrVO3. However, CaVO3 and MgVO3 exhibit spin-gapless and magnetic semiconductor characteristics, respectively. The microscopic origin of the transition from the half-metallic to semiconductor nature of AVO3 is rationalized using electronic properties. The presence of covalent, ionic, and metallic bonds in AVO3 compounds is found by the analysis of bonding properties. The single-band nature of half-metallic AVO3 is seen by observing hole-like Fermi surfaces in this study. Furthermore, the various thermodynamic and optical properties are calculated and analyzed. The refractive index suggests that AVO3 could be a potential candidate for applications to high-density optical data storage devices.
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Affiliation(s)
- Md. Mijanur Rahaman
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | | | - Mirza Humaun Kabir Rubel
- Department
of Materials Science and Engineering, University
of Rajshahi, Rajshahi 6205, Bangladesh
| | - A. K. M. Azharul Islam
- Department
of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh
- International
Islamic University Chittagong, Kumira, Chittagong 4318, Bangladesh
| | - Seiji Kojima
- Graduate
School of Pure and Applied Sciences, University
of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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7
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Levit R, Martinez-Garcia JC, Ochoa DA, García JE. The generalized Vogel-Fulcher-Tamman equation for describing the dynamics of relaxor ferroelectrics. Sci Rep 2019; 9:12390. [PMID: 31455803 PMCID: PMC6711973 DOI: 10.1038/s41598-019-48864-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 08/12/2019] [Indexed: 11/27/2022] Open
Abstract
Relaxor ferroelectrics (RF) are outstanding materials owing to their extraordinary dielectric, electromechanical, and electro-optical properties. Although their massive applications, they remain to be one of the most puzzling solid-state materials because understanding their structural local order and relaxation dynamics is being a long-term challenge in materials science. The so-called Vogel-Fulcher-Tamman (VFT) relation has been extensively used to parameterize the relaxation dynamics in RF, although no microscopic description has been firmly established for such empirical relation. Here, we show that VFT equation is not always a proper approach for describing the dielectric relaxation in RF. Based on the Adam-Gibbs model and the Grüneisen temperature index, a more general equation to disentangle the relaxation kinetic is proposed. This approach allows to a new formulation for the configurational entropy leading to a local structural heterogeneity related order parameter for RF. A new pathway to disentangle relaxation phenomena in other relaxor ferroics could have opened.
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Affiliation(s)
- Rafael Levit
- Department of Physics, Universitat Politècnica de Catalunya - BarcelonaTech, 08034, Barcelona, Spain
| | - Julio C Martinez-Garcia
- Group of Nanomaterials and Microsystems, Department of Physics, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
| | - Diego A Ochoa
- Department of Physics, Universitat Politècnica de Catalunya - BarcelonaTech, 08034, Barcelona, Spain
| | - José E García
- Department of Physics, Universitat Politècnica de Catalunya - BarcelonaTech, 08034, Barcelona, Spain.
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Vinod M, Raghavan G, Sivasubramanian V. Fano resonance between coherent acoustic phonon oscillations and electronic states near the bandgap of photoexcited GaAs. Sci Rep 2018; 8:17706. [PMID: 30532007 PMCID: PMC6286371 DOI: 10.1038/s41598-018-35866-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 10/31/2018] [Indexed: 11/09/2022] Open
Abstract
Impulsive photo-excitation of solids results in a travelling strain pulse which manifests itself as coherent acoustic phonon oscillations. These oscillations have been extensively studied using time-resolved pump-probe spectroscopy. In the present work, we report the generation of extremely long-lived, coherent longitudinal acoustic phonon oscillations in intrinsic GaAs (100), with clear and unambiguous evidence of Fano interference between these oscillations and the continuum of electronic states close to the bandgap. Fano resonance is a widespread phenomenon observed in atomic systems and condensed media that arises from quantum interference between a continuum of quantum states and a discrete quantum state. Among other techniques, Fano resonance has been investigated with respect to optical phonons studied with Raman Spectroscopy. In the present work, we investigate Fano resonance in coherent phonon oscillations generated without the aid of any capping layer, dopants or substrate/interface effects. Since Fano resonance is sensitive to changes in electronic structure, doping and defects, these observations are important to the field of picosecond ultrasonics which is used for non-destructive depth profiling of solids and for carrier diffusion studies.
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Affiliation(s)
- M Vinod
- Materials Science Group Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, Tamil Nadu, India
| | - G Raghavan
- Materials Science Group Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, Tamil Nadu, India. .,Homi Bhabha National Institute, Mumbai, India.
| | - V Sivasubramanian
- Materials Science Group Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, Tamil Nadu, India.,Homi Bhabha National Institute, Mumbai, India
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9
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Role of polar nanoregions with weak random fields in Pb-based perovskite ferroelectrics. Sci Rep 2017; 7:44448. [PMID: 28300152 PMCID: PMC5353716 DOI: 10.1038/srep44448] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/08/2017] [Indexed: 11/09/2022] Open
Abstract
In relaxor ferroelectrics, the role of randomly orientated polar nanoregions (PNRs) with weak random fields (RFs) is one of the most puzzling issues of materials science. The relaxation time of polarization fluctuations of PNRs, which manifests themselves as a central peak (CP) in inelastic light scattering, is the important physical quantity to understand the dynamics of PNRs. Here, the angular and temperature dependences of depolarized and polarized CPs in 0.44Pb(Mg1/3Nb2/3)O3-0.56PbTiO3 single crystals with weak RFs have been studied by Raman and Brillouin scattering, respectively. The CPs observed in Raman scattering show the very clear angular dependence which is consistent with the local tetragonal symmetry. It is different from the well-known local rhombohedral symmetry with strong RFs for Pb(Mg1/3Nb2/3)O3. In Brillouin scattering, depolarized and polarized CPs show two relaxation processes corresponding to transverse and longitudinal fluctuations of PNRs. The remarkable slowing down towards the Curie temperature was observed for transverse fluctuations in local tetragonal symmetry.
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