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Chandra M, Yadav S, Rawat R, Choudhary RJ, Sinha AK, Sagdeo A, Singh MN, Singh K. Temperature dependent structural properties of Mn 1.90M 0.10O 3(M = Cr and Fe). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:095401. [PMID: 37972396 DOI: 10.1088/1361-648x/ad0d28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/16/2023] [Indexed: 11/19/2023]
Abstract
The polycrystalline samples of Mn1.90Cr0.10O3(MCO) and Mn1.90Fe0.10O3(MFO) have been investigated for their temperature dependent magnetic and structural properties. The Cr and Fe substitutions have significant effect on the magnetic and structural properties of Mn2O3. Like pristine Mn2O3, the Cr and Fe substituted samples MCO and MFO also exhibit two antiferromagnetic transitions; one at ∼77 K, ∼80 K, respectively and another at ∼40 K. Our room temperature synchrotron x-ray powder diffraction (SXRD) results confirm that both the MCO and MFO samples crystallize in cubic symmetry. The temperature dependent SXRD results demonstrate the cubic to orthorhombic structural transition for the studied samples. The pristine Mn2O3shows cubic to orthorhombic transition around 310 K, whereas this structural transition shifted towards lower temperature side with these substitutions i.e. around 240 K for MCO and 260 K for MFO. Interestingly, the centrosymmetricPcabto non-centrosymmetricPca21change in symmetry is also resolved at the ferroelectric ordering temperature for MCO.
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Affiliation(s)
- Mohit Chandra
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - Satish Yadav
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - Rajeev Rawat
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - R J Choudhary
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - A K Sinha
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
- Department of Physics, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand, India
| | - A Sagdeo
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
| | - M N Singh
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
| | - Kiran Singh
- Department of Physics, Dr B. R. Ambedkar National Institute of Technology, Jalandhar 144008, India
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Peng W, Balédent V, Lepetit MB, Vaunat A, Rebolini E, Greenblatt M, Foury-Leylekian P. Pressure-dependent X-ray diffraction of the multiferroics RMn 2O 5. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2019; 75:687-696. [PMID: 32830724 DOI: 10.1107/s2052520619007844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 05/31/2019] [Indexed: 06/11/2023]
Abstract
The room-temperature structural properties of the RMn2O5 multiferroics have been investigated under pressure, using powder X-ray scattering and density functional theory (DFT) calculations. It was possible to determine the lattice parameters and the main atomic positions as a function of pressure. Good agreement was observed between the X-ray and DFT results for most of the determined crystallographic data. From the DFT calculations, it was possible to infer the pressure evolution of the exchange interactions, and this analysis led to the conclusion that the onset of the q = (½, 0, ½) magnetic structure under pressure is related to the increase in the J1 super-exchange terms (due to the reduction in the Mn-O distances) compared with the Mn-R exchange interactions. In addition, the 1D antiferromagnetic character of the compounds should be reinforced under pressure.
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Affiliation(s)
- Wei Peng
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay cedex, France
| | - Victor Balédent
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay cedex, France
| | | | - Antoine Vaunat
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay cedex, France
| | - Elisa Rebolini
- Institut Laue-Langevin, 72 avenue des Martyrs, 38042 Grenoble, France
| | - Martha Greenblatt
- Department of Chemistry and Chemical Biology, Rutgers, State University of New Jersey, Piscataway, NJ 08854, USA
| | - Pascale Foury-Leylekian
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay cedex, France
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Zobkalo IA, Gavrilov SV, Sazonov A, Hutanu V. Investigation of TbMn 2O 5 by polarized neutron diffraction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:205804. [PMID: 29651995 DOI: 10.1088/1361-648x/aabdf6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In order to make a new approach to the elucidation of the microscopic mechanisms of multiferroicity in the RMn2O5 family, experiments with different methods of polarized neutrons scattering were performed on a TbMn2O5 single crystal. We employed three different techniques of polarized neutron diffraction without the analysis after scattering, the XYZ-polarization analysis, and technique of spherical neutron polarimetry (SNP). Measurements with SNP were undertaken both with and without external electric field. A characteristic difference in the population of 'right' and 'left' helix domains in all magnetically ordered phases of TbMn2O5, was observed. This difference can be controlled by an external electric field in the field-cooled mode. The analysis of the results gives an evidence that antisymmetric Dzyaloshinsky-Moria exchange is effective in all the magnetic phases in TbMn2O5.
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Affiliation(s)
- I A Zobkalo
- B.P. Konstantinov Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina, 188300, Russia. Saint-Petersburg State University, Saint-Petersburg, 199034, Russia
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Chattopadhyay S, Petit S, Ressouche E, Raymond S, Balédent V, Yahia G, Peng W, Robert J, Lepetit MB, Greenblatt M, Foury-Leylekian P. 3d-4f coupling and multiferroicity in frustrated Cairo Pentagonal oxide DyMn 2O 5. Sci Rep 2017; 7:14506. [PMID: 29109510 PMCID: PMC5674039 DOI: 10.1038/s41598-017-15150-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 10/16/2017] [Indexed: 11/11/2022] Open
Abstract
In solid state science, multifunctional materials and especially multiferroics have attracted a great deal of attention, as they open the possibility for next generation spintronic and data storage devices. Interestingly, while many of them host coexisting 3d and 4f elements, the role of the coupling between these two magnetic entities has remained elusive. By means of single crystal neutron diffraction and inelastic neutron scattering experiments we shed light on this issue in the particular case of the multiferroic oxide DyMn2O5. This compound undergoes a first order magnetic transition from a high temperature incommensurate phase to a low temperature commensurate one. Our investigation reveals that although these two phases have very different magnetic structures, the spin excitations are quite similar indicating a fragile low temperature ground state with respect to the high temperature one. Such a rare scenario is argued to be a manifestation of the competition between the exchange interaction and 4f magnetic anisotropy present in the system. It is concluded that the magnetic structure, hence the ferroelectricity, can be finely tuned depending on the anisotropy of the rare earth.
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Affiliation(s)
- S Chattopadhyay
- INAC-MEM, CEA-Grenoble and Université Grenoble Alpes, F-38000, Grenoble, France.
| | - S Petit
- Laboratoire Léon Brillouin, CEA, CNRS, Université Paris-Saclay, CE-Saclay, F-91191, Gif-sur-Yvette, Cedex, France
| | - E Ressouche
- INAC-MEM, CEA-Grenoble and Université Grenoble Alpes, F-38000, Grenoble, France
| | - S Raymond
- INAC-MEM, CEA-Grenoble and Université Grenoble Alpes, F-38000, Grenoble, France
| | - V Balédent
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, cedex, France
| | - G Yahia
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, cedex, France
| | - W Peng
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, cedex, France
| | - J Robert
- Institut Néel, CNRS and Université Grenoble Alpes, 38042, Grenoble, cedex 9, France
| | - M-B Lepetit
- Institut Néel, CNRS and Université Grenoble Alpes, 38042, Grenoble, cedex 9, France
| | - M Greenblatt
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, Piscataway, NJ, 08854, USA
| | - P Foury-Leylekian
- Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, cedex, France
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Upadhyay SK, Iyer KK, Gohil S, Ghosh S, Paulose PL, Sampathkumaran EV. Pyrocurrent anomalies and intrinsic magnetodielectric behavior near room temperature in Li 2Ni 2Mo 3O 12, a compound with distorted honeycomb and spin-chains. Sci Rep 2017; 7:4449. [PMID: 28667268 PMCID: PMC5493632 DOI: 10.1038/s41598-017-04025-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 05/08/2017] [Indexed: 11/09/2022] Open
Abstract
Keeping current interests to identify materials with intrinsic magnetodielectric behaviour near room temperature and with novel pyroelectric current anomalies, we report temperature and magnetic-field dependent behavior of complex dielectric permittivity and pyroelectric current for an oxide, Li2Ni2Mo3O12, containing magnetic ions with (distorted) honey-comb and chain arrangement and ordering magnetically below 8 K. The dielectric data reveal the existence of relaxor ferroelectricity behaviour in the range 160-240 K and there are corresponding Raman mode anomalies as well in this temperature range. Pyrocurrent behavior is also consistent with this interpretation, with the pyrocurrent peak-temperature interestingly correlating with the poling temperature. 7Li NMR offer an evidence for crystallographic disorder intrinsic to this compound and we therefore conclude that such a disorder is apparently responsible for the randomness of local electric field leading to relaxor ferroelectric property. Another observation of emphasis is that there is a notable decrease in the dielectric constant with the application of magnetic field to the tune of about -2.4% at 300 K, with the magnitude varying marginally with temperature. Small loss factor values validate the intrinsic behaviour of the magnetodielectric effect at room temperature.
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Affiliation(s)
- Sanjay Kumar Upadhyay
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Kartik K Iyer
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Smita Gohil
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Shankar Ghosh
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - P L Paulose
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - E V Sampathkumaran
- Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India.
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6
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Yang L, Li X, Liu MF, Li PL, Yan ZB, Zeng M, Qin MH, Gao XS, Liu JM. Understanding the multiferroicity in TmMn 2O 5 by a magnetically induced ferrielectric model. Sci Rep 2016; 6:34767. [PMID: 27713482 PMCID: PMC5054431 DOI: 10.1038/srep34767] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/19/2016] [Indexed: 11/30/2022] Open
Abstract
The magnetically induced electric polarization behaviors in multiferroic TmMn2O5 in response to varying temperature and magnetic field are carefully investigated by means of a series of characterizations including the high precision pyroelectric current technique. Here polycrystalline rather than single crystal samples are used for avoiding the strong electrically self-polarized effect in single crystals, and various parallel experiments on excluding the thermally excited current contributions are performed. The temperature-dependent electric polarization flop as a major character is identified for different measuring paths. The magneto-current measurements indicate that the electric polarization in the low temperature magnetic phase region has different origin from that in the high temperature magnetic phase. It is suggested that the electric polarization does have multiple components which align along different orientations, including the Mn3+-Mn4+-Mn3+ exchange striction induced polarization PMM, the Tm3+-Mn4+-Tm3+ exchange striction induced polarization PTM, and the low temperature polarization PLT probably associated with the Tm3+ commensurate phase. The observed electric polarization flop can be reasonably explained by the ferrielectric model proposed earlier for DyMn2O5, where PMM and PTM are the two antiparallel components both along the b-axis and PLT may align along the a-axis. Finally, several issues on the unusual temperature dependence of ferroelectric polarizations are discussed.
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Affiliation(s)
- L Yang
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - X Li
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - M F Liu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - P L Li
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - Z B Yan
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - M Zeng
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - M H Qin
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - X S Gao
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - J-M Liu
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China.,Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.,Institute for Advanced Materials, Hubei Normal University, Huangshi 435003, China
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7
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Abstract
As atoms and molecules condense to form solids, a crystalline state can emerge with its highly ordered geometry and subnanometric lattice constant. In some physical systems, such as ferroelectric perovskites, a perfect crystalline structure forms even when the condensing substances are non-stoichiometric. The resulting solids have compositional disorder and complex macroscopic properties, such as giant susceptibilities and non-ergodicity. Here, we observe the spontaneous formation of a cubic structure in composite ferroelectric potassium-lithium-tantalate-niobate with micrometric lattice constant, 10(4) times larger than that of the underlying perovskite lattice. The 3D effect is observed in specifically designed samples in which the substitutional mixture varies periodically along one specific crystal axis. Laser propagation indicates a coherent polarization super-crystal that produces an optical X-ray diffractometry, an ordered mesoscopic state of matter with important implications for critical phenomena and applications in miniaturized 3D optical technologies.
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