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Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe 0.5Nb 0.5O 3)-(Co 0.6Zn 0.4Fe 1.7Mn 0.3O 4) composites. Sci Rep 2021; 11:3149. [PMID: 33542285 PMCID: PMC7862596 DOI: 10.1038/s41598-021-82399-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 01/08/2021] [Indexed: 11/20/2022] Open
Abstract
Multiferroic composites are promising candidates for magnetic field sensors, next-generation low power memory and spintronic devices, as they exhibit much higher magnetoelectric (ME) coupling and coupled ordering parameters compared to the single-phase multiferroics. Hence, the 3-0 type particulate multiferroic composites having general formula (1 − Φ)[PbFe0.5Nb0.5O3]-Φ[Co0.6Zn0.4Fe1.7Mn0.3O4] (Φ = 0.0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1.0, (1 − Φ) PFN-ΦCZFMO) were prepared using a hybrid synthesis technique. Preliminary structural and microstructural analysis were carried out using XRD and FESEM techniques, which suggest the formation of 3-0 type particulate composite without the presence of any impurity phases. The multiferroic behaviour of the composites is studied with polarization versus electric field (P-E) and magnetization versus magnetic field (M-H) characteristics at room temperature. The nature of ME coupling was investigated elaborately by employing the Landau free energy equation along with the magneto-capacitance measurement. This investigation suggests the existence of biquadratic nature of ME coupling (P2M2). The magneto-electric coupling measurement also suggests that strain mediated domain coupling between the ferroelectric and magnetic ordering is responsible for the magneto-electric behaviour. The obtained value of direct ME coefficient 26.78 mV/cm-Oe for Φ = 0.3, found to be higher than the well-known single-phase materials and polycrystalline composites.
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Pradhan DK, Kumari S, Rack PD. Magnetoelectric Composites: Applications, Coupling Mechanisms, and Future Directions. NANOMATERIALS 2020; 10:nano10102072. [PMID: 33092147 PMCID: PMC7589497 DOI: 10.3390/nano10102072] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 12/04/2022]
Abstract
Multiferroic (MF)-magnetoelectric (ME) composites, which integrate magnetic and ferroelectric materials, exhibit a higher operational temperature (above room temperature) and superior (several orders of magnitude) ME coupling when compared to single-phase multiferroic materials. Room temperature control and the switching of magnetic properties via an electric field and electrical properties by a magnetic field has motivated research towards the goal of realizing ultralow power and multifunctional nano (micro) electronic devices. Here, some of the leading applications for magnetoelectric composites are reviewed, and the mechanisms and nature of ME coupling in artificial composite systems are discussed. Ways to enhance the ME coupling and other physical properties are also demonstrated. Finally, emphasis is given to the important open questions and future directions in this field, where new breakthroughs could have a significant impact in transforming scientific discoveries to practical device applications, which can be well-controlled both magnetically and electrically.
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Affiliation(s)
- Dhiren K. Pradhan
- Department of Materials Science & Engineering, University of Tennessee, Knoxville, TN 37996, USA
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Correspondence: (D.K.P.); (P.D.R.)
| | - Shalini Kumari
- Department of Materials Science & Engineering, The Pennsylvania State University, University Park, PA 16802, USA;
| | - Philip D. Rack
- Department of Materials Science & Engineering, University of Tennessee, Knoxville, TN 37996, USA
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Correspondence: (D.K.P.); (P.D.R.)
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3
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Evans DM, Garcia V, Meier D, Bibes M. Domains and domain walls in multiferroics. PHYSICAL SCIENCES REVIEWS 2020. [DOI: 10.1515/psr-2019-0067] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractMultiferroics are materials combining several ferroic orders, such as ferroelectricity, ferro- (or antiferro-) magnetism, ferroelasticity and ferrotoroidicity. They are of interest both from a fundamental perspective, as they have multiple (coupled) non-linear functional responses providing a veritable myriad of correlated phenomena, and because of the opportunity to apply these functionalities for new device applications. One application is, for instance, in non-volatile memory, which has led to special attention being devoted to ferroelectric and magnetic multiferroics. The vision is to combine the low writing power of ferroelectric information with the easy, non-volatile reading of magnetic information to give a “best of both worlds” computer memory. For this to be realised, the two ferroic orders need to be intimately linked via the magnetoelectric effect. The magnetoelectric coupling – the way polarization and magnetization interact – is manifested by the formation and interactions of domains and domain walls, and so to understand how to engineer future devices one must first understand the interactions of domains and domain walls. In this article, we provide a short introduction to the domain formation in ferroelectrics and ferromagnets, as well as different microscopy techniques that enable the visualization of such domains. We then review the recent research on multiferroic domains and domain walls, including their manipulation and intriguing properties, such as enhanced conductivity and anomalous magnetic order. Finally, we discuss future perspectives concerning the field of multiferroic domain walls and emergent topological structures such as ferroelectric vortices and skyrmions.
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Affiliation(s)
- Donald M. Evans
- Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Vincent Garcia
- CNRS, Thales, Université Paris-Saclay, Unité Mixte de Physique, 91767 Palaiseau, France
| | - Dennis Meier
- Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Manuel Bibes
- CNRS, Thales, Université Paris-Saclay, Unité Mixte de Physique, 91767 Palaiseau, France
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Abdullah MF, Pal P, Chandrakanta K, Jena R, Devi S, Yadav CS, Singh AK. Enhanced magnetic and room temperature intrinsic magnetodielectric effect in Mn modified Ba 2Mg 2Fe 12O 22 Y-type hexaferrite. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:135701. [PMID: 31775136 DOI: 10.1088/1361-648x/ab5c2b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We have reported a systematic investigation on structural, magnetic, magnetodielectric and magnetoimpedance characteristics of Y-type Ba2Mg2(Fe1-x Mn x )12O22 (0 ⩽ x ⩽ 0.12) hexaferrite synthesized by solid-state reaction route. Rietveld refinement of x-ray diffraction pattern confirms the phase purity of all the samples with rhombohedral crystal structure. The Mn dopant modulates not only superexchange angle near to the boundary of magnetic blocks but also magnetic transition temperature. Temperature-dependent magnetization data suggests that due to Mn doping at Fe sites, ferrimagnetic to proper screw transition temperature (T II) increases from 190 K to 208 K, while there is a decrease in proper screw to longitudinal conical spin transition temperature (T I) from 35 K to 25 K. We observe remarkable decrease in the magnetic field from 20 kOe to 12 kOe to produce intermediate spin ordering from ferrimagnetic ordering which can be understood because of modification of superexchange angle due to Mn doping. The value of loss tangent decreases with increasing doping concentration at 300K, i.e. ~60% and 180% in BMFM4 (x = 0.04) and BMFM8 (x = 0.08) respectively as compared to BMF, suggesting the evolution of intrinsic feature in the doped samples. Magnetodielectric (MD) effect shows that in the low-frequency regime, the robust MD effect is because of Maxwell-Wagner interfacial polarization, whereas in the high-frequency regime intrinsic effect dominates. Further, magnetoimpedance measurement confirms the presence of substantial intrinsic MD% (~6%) at 1.3 T applied field at 300 K for 4% Mn-doped sample. Finally, the nature and strength of magnetoelectric coupling in BMFM4 and BMFM8 samples at 300 K is found to be biquadratic (P 2 M 2) and maximum strength of coupling is 3.09 × 10-4 emu2 g-2 and 2.34 × 10-4 emu2 g-2, respectively.
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Affiliation(s)
- Md F Abdullah
- Department of Physics and Astronomy, National Institute of Technology, Rourkela-769008, Odisha, India
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5
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Lead palladium titanate: A room temperature nanoscale multiferroic thin film. Sci Rep 2020; 10:2991. [PMID: 32076080 PMCID: PMC7031505 DOI: 10.1038/s41598-020-59961-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/23/2019] [Indexed: 11/08/2022] Open
Abstract
The discovery of single-phase multiferroic materials and the understanding of coupling mechanisms between their spin and polarization is important from the point of view of next generation logic and memory devices. Herein we report the fabrication, dielectric, ferroelectric, piezo-response force microscopy, and magnetization measurements of Pd-substituted room-temperature magnetoelectric multiferroic PbPd0.3Ti0.7O3 (PbPdT) thin films. Highly oriented PbPdT thin films were deposited on {(LaAlO3)0.3(Sr2AlTaO6)0.7} (LSAT) substrates in oxygen atmosphere using pulsed laser deposition technique. X-ray diffraction studies revealed that the films had tetragonal phase with (001) orientation. Surface morphology studies using atomic force and scanning electron microscopy suggest a smooth and homogeneous distribution of grains on the film surface with roughness ~2 nm. A large dielectric constant of ~1700 and a low-loss tangent value of ~0.3 at 10 kHz were obtained at room temperature. Temperature dependent dielectric measurements carried out on Pt/PbPdT/La0.7Sr0.3MnO3 (LSMO) metal-dielectric-metal capacitors suggest a ferroelectric to paraelectric transition above 670 K. The measured polarization hysteresis loops at room temperature were attributed to its ferroelectric behavior. From a Tauc plot of (αhν)2 versus energy, the direct band gap Eg of PbPdT thin films was calculated as 3 eV. Ferroelectric piezoelectric nature of the films was confirmed from a strong domain switching response revealed from piezo-response force microscopy. A well-saturated magnetization M-H loop with remanent magnetization of 3.5 emu/cm3 was observed at room temperature, and it retains ferromagnetic ordering in the temperature range 5-395 K. Origin of the magnetization could be traced to the mixed oxidation states of Pd2+/Pd4+ dispersed in polar PbTiO3 matrix, as revealed by our x-ray photoelectron spectroscopic results. These results suggest that PbPdT thin films are multiferroic (ferroelectric-ferromagnetic) at room temperature.
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Liu C, An F, Gharavi PSM, Lu Q, Zha J, Chen C, Wang L, Zhan X, Xu Z, Zhang Y, Qu K, Yao J, Ou Y, Zhao Z, Zhong X, Zhang D, Valanoor N, Chen L, Zhu T, Chen D, Zhai X, Gao P, Jia T, Xie S, Zhong G, Li J. Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing. Natl Sci Rev 2020; 7:84-91. [PMID: 34692020 PMCID: PMC8289034 DOI: 10.1093/nsr/nwz143] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/27/2019] [Accepted: 08/28/2019] [Indexed: 11/14/2022] Open
Abstract
Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi(1-y)/2Fe y Mg(1-y)/2O3-(x)CaTiO3 (BTFM-CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7-3.0 × 10-7 s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM-CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.
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Affiliation(s)
- Cong Liu
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
| | - Feng An
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Paria S M Gharavi
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Qinwen Lu
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Junkun Zha
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Chao Chen
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Liming Wang
- Dongguan Neutron Science Center, Dongguan 523803, China
| | - Xiaozhi Zhan
- Dongguan Neutron Science Center, Dongguan 523803, China
| | - Zedong Xu
- Department of Physics, Southern University of Science and Technology, Shenzhen 518005, China
| | - Yuan Zhang
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Ke Qu
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
- International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China
| | - Junxiang Yao
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
| | - Yun Ou
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
- Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Zhiming Zhao
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Xiangli Zhong
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Dongwen Zhang
- Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, China
| | - Nagarajan Valanoor
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Lang Chen
- Department of Physics, Southern University of Science and Technology, Shenzhen 518005, China
| | - Tao Zhu
- Dongguan Neutron Science Center, Dongguan 523803, China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan Neutron Science Center, Dongguan 523808, China
| | - Deyang Chen
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
| | - Xiaofang Zhai
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Peng Gao
- International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China
| | - Tingting Jia
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
| | - Shuhong Xie
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China
| | - Gaokuo Zhong
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
| | - Jiangyu Li
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China
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McBean CL, Lewis CS, Tiano AL, Simonson JW, Han MG, Gannon WJ, Yue S, Patete JM, Corrao AA, Santulli AC, Wu L, Aronson MC, Zhu Y, Wong SS. A Generalizable Multigram Synthesis and Mechanistic Investigation of YMnO3 Nanoplates. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Coray L. McBean
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
| | - Crystal S. Lewis
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
| | - Amanda L. Tiano
- US Nano, LLC, 1748 Independence Boulevard, Building A, Sarasota, Florida 34234, United States
| | - Jack W. Simonson
- Department of Physics, Farmingdale State College, Farmingdale, New York 11735-1021, United States
| | - Myung-Geun Han
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Building 480, Upton, New York 11973, United States
| | - William J. Gannon
- Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, United States
| | - Shiyu Yue
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
| | - Jonathan M. Patete
- Department of Chemistry, Manhattan College, Riverdale, New York 10471, United States
| | - Adam A. Corrao
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
| | - Alexander C. Santulli
- Department of Chemistry, Manhattan College, Riverdale, New York 10471, United States
| | - Lijun Wu
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Building 480, Upton, New York 11973, United States
| | - Meigan C. Aronson
- Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, United States
| | - Yimei Zhu
- Department of Physics, Farmingdale State College, Farmingdale, New York 11735-1021, United States
- Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800, United States
| | - Stanislaus S. Wong
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Building 480, Upton, New York 11973, United States
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8
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Rai HM, Singh P, Saxena SK, Mishra V, Warshi MK, Kumar R, Rajput P, Sagdeo A, Choudhuri I, Pathak B, Sagdeo PR. Room-Temperature Magneto-dielectric Effect in LaGa 0.7Fe 0.3O 3+γ; Origin and Impact of Excess Oxygen. Inorg Chem 2017; 56:3809-3819. [PMID: 28306265 DOI: 10.1021/acs.inorgchem.6b02507] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report an observation of room-temperature magneto-dielectric (RTMD) effect in LaGa0.7Fe0.3O3+γ compound. The contribution of intrinsic/resistive sources in the presently observed RTMD effect was analyzed by measuring direct-current (dc) magnetoresistance (MR) in four-probe geometry and frequency-dependent MR via impedance spectroscopy (MRIS). Present MRIS analysis reveals that at frequencies corresponding to grain contribution (≥1 × 106 Hz for present sample), the observed MD phenomenon is MR-free/intrinsic, whereas at lower probing frequencies (<1 × 106 Hz), the observed MD coupling appears to be MR-dominated possibly due to oxygen excess, that is, due to coexistence of Fe3+ and Fe4+. The magnetostriction is anticipated as a mechanism responsible for MR-free/intrinsic MD coupling, whereas the MR-dominated part is attributed to hopping charge transport along with Maxwell-Wagner and space charge polarization. The multivalence of Fe ions in LaGa0.7Fe0.3O3+γ was validated through iodometric titration and Fe K-edge X-ray absorption near-edge structure measurements. The excess of oxygen, that is, coexistence of Fe3+ and Fe4+, was understood in terms of stability of Fe4+ by means of "bond-valence-sum" analysis and density functional theory-based first-principles calculations. The cation vacancies at La/Ga site (or at La and Ga both) were proposed as the possible origin of excess oxygen in presently studied compound. Present investigation suggests that, to justify the intrinsic/resistive origin of MD phenomenon, frequency-dependent MR measurements are more useful than measuring only dc MR or comparing the trends of magnetic-field-dependent change in dielectric constant and tan δ. Presently studied Fe-doped LaGaO3 can be a candidate for RTMD applications.
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Affiliation(s)
| | | | | | | | | | | | - Parasmani Rajput
- Atomic & Molecular Physics Division, Bhabha Atomic research Centre , Mumbai 400085, India
| | - Archna Sagdeo
- Raja Ramanna Center for Advance Technology , Indore, M.P. 452013, India
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9
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Wang Y, Zhao H, Zhang L, Chen J, Xing X. PbTiO3-based perovskite ferroelectric and multiferroic thin films. Phys Chem Chem Phys 2017; 19:17493-17515. [DOI: 10.1039/c7cp01347g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferroelectric thin films, especially PbTiO3-based perovskite thin films which possess robust spontaneous electrical polarization, are widely investigated and applied in various devices.
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Affiliation(s)
- Yilin Wang
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Hanqing Zhao
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- China
| | - Linxing Zhang
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Jun Chen
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Xianran Xing
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
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10
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Schiemer JA, Lascu I, Harrison RJ, Kumar A, Katiyar RS, Sanchez DA, Ortega N, Mejia CS, Schnelle W, Shinohara H, Heap AJF, Nagaratnam R, Dutton SE, Scott JF, Nair B, Mathur ND, Carpenter MA. Elastic and anelastic relaxation behaviour of perovskite multiferroics II: PbZr 0.53Ti 0.47O 3 (PZT)-PbFe 0.5Ta 0.5O 3 (PFT). JOURNAL OF MATERIALS SCIENCE 2016; 52:285-304. [PMID: 27829689 PMCID: PMC5076019 DOI: 10.1007/s10853-016-0330-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 08/22/2016] [Indexed: 06/06/2023]
Abstract
Elastic and anelastic properties of ceramic samples of multiferroic perovskites with nominal compositions across the binary join PbZr0.53Ti0.47O3-PbFe0.5Ta0.5O3 (PZT-PFT) have been assembled to create a binary phase diagram and to address the role of strain relaxation associated with their phase transitions. Structural relationships are similar to those observed previously for PbZr0.53Ti0.47O3-PbFe0.5Nb0.5O3 (PZT-PFN), but the magnitude of the tetragonal shear strain associated with the ferroelectric order parameter appears to be much smaller. This leads to relaxor character for the development of ferroelectric properties in the end member PbFe0.5Ta0.5O3. As for PZT-PFN, there appear to be two discrete instabilities rather than simply a reorientation of the electric dipole in the transition sequence cubic-tetragonal-monoclinic, and the second transition has characteristics typical of an improper ferroelastic. At intermediate compositions, the ferroelastic microstructure has strain heterogeneities on a mesoscopic length scale and, probably, also on a microscopic scale. This results in a wide anelastic freezing interval for strain-related defects rather than the freezing of discrete twin walls that would occur in a conventional ferroelastic material. In PFT, however, the acoustic loss behaviour more nearly resembles that due to freezing of conventional ferroelastic twin walls. Precursor softening of the shear modulus in both PFT and PFN does not fit with a Vogel-Fulcher description, but in PFT there is a temperature interval where the softening conforms to a power law suggestive of the role of fluctuations of the order parameter with dispersion along one branch of the Brillouin zone. Magnetic ordering appears to be coupled only weakly with a volume strain and not with shear strain but, as with multiferroic PZT-PFN perovskites, takes place within crystals which have significant strain heterogeneities on different length scales.
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Affiliation(s)
- J. A. Schiemer
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ UK
| | - I. Lascu
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ UK
| | - R. J. Harrison
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ UK
| | - A. Kumar
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012 India
| | - R. S. Katiyar
- Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, PO Box 23334, San Juan, PR 00931-3334 USA
| | - D. A. Sanchez
- Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, PO Box 23334, San Juan, PR 00931-3334 USA
| | - N. Ortega
- Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, PO Box 23334, San Juan, PR 00931-3334 USA
| | - C. Salazar Mejia
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - W. Schnelle
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - H. Shinohara
- Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE UK
| | - A. J. F. Heap
- Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE UK
| | - R. Nagaratnam
- Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE UK
| | - S. E. Dutton
- Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE UK
| | - J. F. Scott
- Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE UK
- School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS UK
| | - B. Nair
- Department of Materials Science, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS UK
| | - N. D. Mathur
- Department of Materials Science, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS UK
| | - M. A. Carpenter
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ UK
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11
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Song S, Han H, Jang HM, Kim YT, Lee NS, Park CG, Kim JR, Noh TW, Scott JF. Implementing Room-Temperature Multiferroism by Exploiting Hexagonal-Orthorhombic Morphotropic Phase Coexistence in LuFeO3 Thin Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:7430-7435. [PMID: 27309997 DOI: 10.1002/adma.201601989] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 05/23/2016] [Indexed: 06/06/2023]
Abstract
Room-temperature multiferroism in LuFeO3 (LFO) films is demonstrated by exploiting the orthorhombic-hexagonal (o-h) morphotrophic phase coexistence. The LFO film further reveals a magnetoelectric coupling effect that is not shown in single-phase (h- or o-) LFO. The observed multiferroism is attributed to the combination of sufficient polarization from h-LFO and net magnetization from o-LFO.
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Affiliation(s)
- Seungwoo Song
- Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Hyeon Han
- Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Hyun Myung Jang
- Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea.
| | - Young Tae Kim
- Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Nam-Suk Lee
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Chan Gyung Park
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Jeong Rae Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Department of Physics and Astronomy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Tae Won Noh
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Department of Physics and Astronomy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - James F Scott
- School of Chemistry and Physics, St. Andrews University, St. Andrews, Scotland, KY16 9ST, UK
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Mohapatra SR, Swain A, Yadav CS, Kaushik SD, Singh AK. Unequivocal evidence of enhanced magnetodielectric coupling in Gd3+substituted multiferroic Bi2Fe4O9. RSC Adv 2016. [DOI: 10.1039/c6ra24525k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report an enhanced magnetodielectric (MD) coupling in antiferromagnetic Bi2Fe4O9(BFO) lightly substituted by gadolinium (Gd3+).
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Affiliation(s)
- S. R. Mohapatra
- Department of Physics and Astronomy
- National Institute of Technology
- Rourkela-769008
- India
| | - A. Swain
- School of Physics
- University of Hyderabad
- Hyderabad-500046
- India
| | - C. S. Yadav
- School of Basic Sciences
- Indian Institute of Technology Mandi
- Mandi-175001
- India
| | - S. D. Kaushik
- UGC-DAE Consortium for Scientific Research Mumbai Centre
- R-5 Shed
- BARC
- Mumbai-400085
- India
| | - A. K. Singh
- Department of Physics and Astronomy
- National Institute of Technology
- Rourkela-769008
- India
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