Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

3d-4f coupling and multiferroicity in frustrated Cairo Pentagonal oxide DyMn2O5

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      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.

      Related collections

      Most cited references 28

      • Record: found
      • Abstract: not found
      • Article: not found

      Recent advances in magnetic structure determination by neutron powder diffraction

        Bookmark
        • Record: found
        • Abstract: found
        • Article: not found

        Multiferroics: a magnetic twist for ferroelectricity.

        Magnetism and ferroelectricity are essential to many forms of current technology, and the quest for multiferroic materials, where these two phenomena are intimately coupled, is of great technological and fundamental importance. Ferroelectricity and magnetism tend to be mutually exclusive and interact weakly with each other when they coexist. The exciting new development is the discovery that even a weak magnetoelectric interaction can lead to spectacular cross-coupling effects when it induces electric polarization in a magnetically ordered state. Such magnetic ferroelectricity, showing an unprecedented sensitivity to ap plied magnetic fields, occurs in 'frustrated magnets' with competing interactions between spins and complex magnetic orders. We summarize key experimental findings and the current theoretical understanding of these phenomena, which have great potential for tuneable multifunctional devices.
          Bookmark
          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Spin current and magneto-electric effect in non-collinear magnets

          A new microscopic mechanism of the magneto-electric (ME) effect based on the spin supercurrent is theoretically presented for non-collinear magnets. The close analogy between the superconductors (charge current) and magnets (spin current) is drawn to derive the distribution of the spin supercurrent and the resultant electric polarization. Application to the spiral spin structure is discussed.
            Bookmark

            Author and article information

            Affiliations
            [1 ]INAC-MEM, CEA-Grenoble and Université Grenoble Alpes, F-38000 Grenoble, France
            [2 ]ISNI 0000 0004 4910 6535, GRID grid.460789.4, Laboratoire Léon Brillouin, CEA, CNRS, , Université Paris-Saclay, CE-Saclay, ; F-91191 Gif-sur-Yvette, Cedex France
            [3 ]ISNI 0000 0001 2171 2558, GRID grid.5842.b, Laboratoire de Physique des Solides, CNRS, , Université Paris-Sud, Université Paris-Saclay, ; 91405 Orsay, cedex France
            [4 ]Institut Néel, CNRS and Université Grenoble Alpes, 38042 Grenoble, cedex 9 France
            [5 ]ISNI 0000 0004 1936 8796, GRID grid.430387.b, Department of Chemistry and Chemical Biology, Rutgers, , the State University of New Jersey, ; Piscataway, NJ 08854 USA
            Contributors
            ch.sumanta@gmail.com
            Journal
            Sci Rep
            Sci Rep
            Scientific Reports
            Nature Publishing Group UK (London )
            2045-2322
            6 November 2017
            6 November 2017
            2017
            : 7
            29109510
            5674039
            15150
            10.1038/s41598-017-15150-w
            © The Author(s) 2017

            Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

            Categories
            Article
            Custom metadata
            © The Author(s) 2017

            Uncategorized

            Comments

            Comment on this article