Room Temperature Magnetically Ordered Polar Corundum GaFeO Displaying Magnetoelectric Coupling.
The polar corundum structure type offers a route to new room temperature multiferroic materials, as the partial LiNbO-type cation ordering that breaks inversion symmetry may be combined with long-range magnetic ordering of high spin d cations above room temperature in the AFeO system. We report the...
| Publicado en: | Journal of the American Chemical Society Vol. 139; no. 4; pp. 1520 - 1532 |
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| Autores principales: | , , , , , , , , , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
2/1/2017
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=121079487&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 121079487 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 2/1/2017 vid: 139 iid: 4 pid: 997 pub: American Chemical Society artinfo: ui: 121079487 10.1021/jacs.6b11128 ppf: 1520 ppct: 12 formats: tig: atl: Room Temperature Magnetically Ordered Polar Corundum GaFeO Displaying Magnetoelectric Coupling. aug: au: Niu, Hongjun Pitcher, Michael J. Corkett, Alex J. Mandal, Pranab Zanella, Marco Claridge, John B. Rosseinsky, Matthew J. Ling, Sanliang Slater, Ben Cora, Furio Dawson, Karl Stamenov, Plamen Batuk, Dmitry Abakumov, Artem M. Bull, Craig L. Smith, Ronald I. Murray, Claire A. Day, Sarah J. affil: Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom Department of Chemistry, University College London, Gower Street, London WC1E 6BT, United Kingdom Centre for Materials and Structures, School of Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom CRANN, Trinity College Dublin, College Green, Dublin 2, Republic of Ireland EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium Skoltech Center for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, 143026 Moscow, Russian Federation ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom Diamond Light Source, Diamond House, Harwell Oxford, Didcot, Oxfordshire OX11 0DE, United Kingdom su: Corundum Multiferroic materials Electron diffraction Density functional theory Ferromagnetism sug: subj: Corundum Multiferroic materials Electron diffraction Density functional theory Ferromagnetism ab: The polar corundum structure type offers a route to new room temperature multiferroic materials, as the partial LiNbO-type cation ordering that breaks inversion symmetry may be combined with long-range magnetic ordering of high spin d cations above room temperature in the AFeO system. We report the synthesis of a polar corundum GaFeO by a high-pressure, high-temperature route and demonstrate that its polarity arises from partial LiNbO-type cation ordering by complementary use of neutron, X-ray, and electron diffraction methods. In situ neutron diffraction shows that the polar corundum forms directly from AlFeO-type GaFeO under the synthesis conditions. The A/Fe cations are shown to be more ordered in polar corundum GaFeO than in isostructural ScFeO. This is explained by DFT calculations which indicate that the extent of ordering is dependent on the configurational entropy available to each system at the very different synthesis temperatures required to form their corundum structures. Polar corundum GaFeO exhibits weak ferromagnetism at room temperature that arises from its FeO-like magnetic ordering, which persists to a temperature of 408 K. We demonstrate that the polarity and magnetization are coupled in this system with a measured linear magnetoelectric coupling coefficient of 0.057 ps/m. Such coupling is a prerequisite for potential applications of polar corundum materials in multiferroic/magnetoelectric devices. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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