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Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2O5

G. Yahia, F. Damay, S. Chattopadhyay, V. Balédent, W. Peng, S. W. Kim, M. Greenblatt, M.-B. Lepetit, and P. Foury-Leylekian
Phys. Rev. B 97, 085128 – Published 15 February 2018
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    Abstract

    We report in this paper the temperature evolution of the magnetic structure of GdMn2O5, in the range 2–40 K, studied by neutron diffraction on an isotope-enriched powder. We detail a thorough analysis of the microscopic mechanisms needed to release the different magnetic frustrations that are at the origin of the polarization. In addition to the usual exchange-striction term, known to be at the origin of the polarization in this family, an additional exchange-striction effect between the Gd3+ and Mn3+ spins is found to be responsible for the very large polarization in the Gd compound.

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    • Received 30 October 2017
    • Revised 17 January 2018

    DOI:https://doi.org/10.1103/PhysRevB.97.085128

    ©2018 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Frustrated magnetismMagnetic interactionsMagnetism
    1. Physical Systems
    MultiferroicsStrongly correlated systems
    1. Techniques
    Neutron diffraction
    Condensed Matter, Materials & Applied PhysicsAccelerators & Beams

    Authors & Affiliations

    G. Yahia1,2, F. Damay3, S. Chattopadhyay4,5,*, V. Balédent1, W. Peng1, S. W. Kim6, M. Greenblatt6, M.-B. Lepetit7,8, and P. Foury-Leylekian1

    • 1Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France
    • 2Laboratoire de Physique de la Matière Condensée, Université Tunis-El Manar, 2092 Tunis, Tunisia
    • 3Laboratoire Léon Brillouin,CEA-CNRS UMR12, 91191 Gif-sur-Yvette Cedex, France
    • 4Université Grenoble Alpes, INAC-MEM, F-38000 Grenoble, France
    • 5CEA-Grenoble, INAC-MEM, F-38000 Grenoble, France
    • 6Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
    • 7Institut Néel, CNRS UPR 2940, 25 Avenue des Martyrs, 38042 Grenoble, France
    • 8Institut Laue Langevin, 72 Avenue des Martyrs, 38042 Grenoble, France

    • *Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany.

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    Issue

    Vol. 97, Iss. 8 — 15 February 2018

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