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Deepak, Saini D, Naskar S, Mandal D, Roy RK. Room Temperature Single-Component Organic Multiferroics with Large Magnetoelectric Coupling: Proficient Approach for Stray-Magnetic Field Harvesting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2405248. [PMID: 39240077 DOI: 10.1002/smll.202405248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2024] [Revised: 08/17/2024] [Indexed: 09/07/2024]
Abstract
Magnetoelectric materials are highly desirable for technological applications due to their ability to produce electricity under a magnetic field. Among the various types of magnetoelectric materials studied, their organic counterparts provide an opportunity to develop solution-processable, flexible, lightweight, and wearable electronic devices. However, there is a rare choice of solution-processable, flexible, lightweight magnetoelectric materials which has tremendous technological interest. A supramolecular scaffold with precisely positioned structure-forming and functional units (electrical dipoles and magnetic spins) is designed so that self-assembly results in functional unit organization. Structure-forming segments allow these scaffolds to self-assemble into hierarchically ordered structures in nonpolar solvents, creating nanofibrous organogel networks. In particular, the xerogel derived from this organogel exhibits the highest magnetoelectric coupling coefficient (αME ≈ 216 mV Oe-1 cm-1) reported to date for organic materials. This is even greater than commonly envisioned composite materials made of piezoelectric polymers and inorganic magnets. This single-component organic multiferroic material displays ferroelectricity (Tc ≈ 46 °C) and paramagnetic behavior at room temperature. With this, it is demonstrated that the possibilities of effectively harvesting stray magnetic fields that are copiously available in the surroundings and wasted otherwise.
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Affiliation(s)
- Deepak
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, SAS Nagar, Punjab, India
| | - Dalip Saini
- Quantum Materials and Devices Unit, Institute of Nanoscience and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, 140306, India
| | - Sudip Naskar
- Quantum Materials and Devices Unit, Institute of Nanoscience and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, 140306, India
| | - Dipankar Mandal
- Quantum Materials and Devices Unit, Institute of Nanoscience and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, 140306, India
| | - Raj Kumar Roy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, SAS Nagar, Punjab, India
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Liu M, Tian Y, Liu Z. Effective Enhancement of the Ferroelectric Performance of Polar Co-Gallate MOF by Doping M 2+ Ions (M = Mg, Mn, Ni) into Framework Nodes. Inorg Chem 2023; 62:7024-7031. [PMID: 37120854 DOI: 10.1021/acs.inorgchem.3c00300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
MOF ferroelectrics have been demonstrated to be a promising candidate owing to various structures and controllable properties. However, weak ferroelectricity hampers their boom. Herein, a convenient strategy, doping metal ions into the framework nodes of parent MOF, is adopted to enhance ferroelectric performance. A series of M-doped Co-Gallate (M = Mg, Mn, Ni) were synthesized to improve ferroelectric properties. The electrical hysteresis loop demonstrated its ferroelectric behaviors, exhibiting obviously improved ferroelectric properties compared with the parent Co-Gallate. The remanent polarization was enhanced by two times for Mg-doped Co-Gallate, six times for Mn-doped Co-Gallate, and four times for Ni-doped Co-Gallate. The promoted ferroelectric performances are ascribed to the enhanced polarity of the overall structure triggered by framework distortion. Intriguingly, ferroelectric behaviors increase in the order Mg < Ni < Mn, displaying the same tendency as the difference value in the ionic radius between Co2+ ions and M2+ metal ions (M = Mg, Mn, Ni). These results demonstrate doping of metal ions is a valid strategy to enhance ferroelectric performances, which may serve as a guide in modulating ferroelectric behaviors.
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Affiliation(s)
- Meiying Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
| | - Yadong Tian
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
| | - Zhiliang Liu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China
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Camargo J, Ramajo L, Castro M. Relationship between the Synthesis Method and the Magnetoelectric Properties of Bismuth Sodium-Potassium Titanate/Nickel Cobalt Ferrite Lead-Free Composites. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2759. [PMID: 37049053 PMCID: PMC10096322 DOI: 10.3390/ma16072759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
In this work, the influence of the synthesis methods of piezoelectric and magnetostrictive phases on the final properties of the Bi0.5(Na0.8K0.2)0.5TiO3-Ni0.5Co0.5Fe2O4 composites was studied. Different routes were used to individually synthesize each phase, and the composites were prepared using different fractions for each phase. Composites were sintered, and the structural, microstructural, dielectric, and magnetoelectric properties were evaluated. According to the selected synthesis method employed for each phase, different particle sizes and reactivities of the individual phases were obtained. These differences determined the suitable sintering temperature for each set of composites and were responsible for the final properties. In fact, magnetoelectric properties were modulated by the combination of composition and synthesis routes.
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Alaoui IH, Moussa M, Lemée N, Le Marrec F, Cantaluppi A, Favry D, Lahmar A. Influence of the Addition of Rare Earth Elements on the Energy Storage and Optical Properties of Bi 0.5Na 0.5TiO 3-0.06BaTiO 3 Polycrystalline Thin Films. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2197. [PMID: 36984077 PMCID: PMC10054931 DOI: 10.3390/ma16062197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/28/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Rare earth element-doped Bi0.5Na0.5TiO3-BaTiO3 (BNT-BT-RE) polycrystalline thin films were processed on a platinized substrate by chemical solution deposition. The microstructure, dielectric, and ferroelectric properties were investigated for all prepared films. It was found that the incorporation of rare earth elements into the BNT-BT matrix increases both the dielectric constant and the breakdown strength while maintaining low dielectric losses, leading to an enhancement of the energy storage density to Wrec = 12 and 16 J/cm3 under an effective field of E = 2500 kV/cm, for Nd- and Dy-based films, respectively. The optical properties of films containing the lanthanide element were investigated and the obtained results bear interest for luminescence applications. The simultaneous appearance of ferroelectric and optical properties in the system under investigation is very promising for advanced optoelectronic devices.
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Magnetodielectric Properties of Ordered Microstructured Polydimethylsiloxane-Based Magnetorheological Elastomer with Fe 3O 4@rGO Nanoparticles. Polymers (Basel) 2023; 15:polym15040941. [PMID: 36850224 PMCID: PMC9961417 DOI: 10.3390/polym15040941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Magnetodielectric properties of prepared ordered microstructured polydimethylsiloxane-based magnetorheological elastomer with the Fe3O4@rGO (Fe3O4@rGO/PDMS-MRE) were investigated to expand the application of magnetorheological elastomer (MRE) in magnetic sensing fields by improving the magnetodielectric effect. Five types of Fe3O4@rGO electromagnetic biphasic composite particles were synthesized by the solvothermal method, and their characterization and magnetic properties were also tested. Microstructurally ordered Fe3O4@rGO/PDMS-MRE samples with different Fe3O4@rGO concentrations were obtained through the magnetic field orientation technique, an experimental platform for magnetodielectric properties was built, and the relative permittivity of the samples was tested under magnetic flux density from 0 to 500 mT. The results show when the ratio of modified Fe3O4 to GO reaches 10:1, the Fe3O4@rGO composite particles exhibit uniform distribution with a flaky structure and strong magnetic properties and have the best bonding effect of composite particles. The relative permittivity of Fe3O4@rGO/PDMS-MRE increases with the rise of Fe3O4@rGO concentration and applied magnetic flux density. The relative permittivity of Fe3O4@rGO/PDMS-MRE with Fe3O4@rGO concentration of 60 wt% reaches 12.934 under the action of 500 mT magnetic flux density, and the magnetodielectric effect is as high as 92.4%. A reasonable mechanism for improving the magnetodielectric effect of ordered microstructured Fe3O4@rGO/PDMS-MRE is proposed.
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Mureddu M, Bartolomé JF, Lopez-Esteban S, Dore M, Enzo S, García Á, Garroni S, Pardo L. Solid State Processing of BCZT Piezoceramics Using Ultra Low Synthesis and Sintering Temperatures. MATERIALS (BASEL, SWITZERLAND) 2023; 16:945. [PMID: 36769951 PMCID: PMC9918272 DOI: 10.3390/ma16030945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/11/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Lead-free (Ba0.92Ca0.08) (Ti0.95 Zr0.05) O3 (BCZT) ceramics were prepared by a solid-state route (SSR) using ultra-low synthesis (700 °C/30 min and 700 °C/2 h) and sintering temperatures (from 1150 °C to 1280 °C), due to prior activation and homogenization by attrition milling of the starting high purity raw materials for 6 h before the synthesis and of the calcined powders for 3 h before the sintering. The comparison of the thermal analysis of the mixture of the starting raw materials and the same mixture after 6 h attrition milling allowed to evidence the mechanisms of activation, resulting in a significant decrease of the perovskite formation temperature (from 854 °C down to 582 °C). The secondary phases that limit the functional properties of the ceramic and their evolution with the sintering conditions were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), which allowed the design of a two-step sintering method to eliminate them. A pure tetragonal BCZT perovskite phase (P4mm, c/a = 1.004) and homogeneous ceramic microstructure was obtained for synthesis at 700 °C for 2 h and sintering with the use of a two-step sintering treatment (900 °C for 3 h and 1280 °C for 6 h). The best electromechanical properties achieved were d33 = 455 pC/N, kp = 35%, Qm = 155.
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Affiliation(s)
- Marzia Mureddu
- Department of Chemical, Physical, Mathematical, and Natural Sciences, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - José F. Bartolomé
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), c/ Sor Juna Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
| | - Sonia Lopez-Esteban
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), c/ Sor Juna Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
| | - Maria Dore
- Department of Chemical, Physical, Mathematical, and Natural Sciences, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Stefano Enzo
- Department of Chemical, Physical, Mathematical, and Natural Sciences, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Álvaro García
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), c/ Sor Juna Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
| | - Sebastiano Garroni
- Department of Chemical, Physical, Mathematical, and Natural Sciences, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Lorena Pardo
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), c/ Sor Juna Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
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