Experimental evidence for the microscopic mechanism of the unusual spin-induced electric polarization in GdMn2 O5

G. Yahia, F. Damay, S. Chattopadhyay, V. Balédent, W. Peng, S. W. Kim, M. Greenblatt, M. B. Lepetit, P. Foury-Leylekian

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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.

Original languageEnglish (US)
Article number085128
JournalPhysical Review B
Volume97
Issue number8
DOIs
StatePublished - Feb 15 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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