Multiferroicity in rare-earth nickelates RNiO3

G. Giovannetti, S. Kumar, Daniel Khomskii, Silvia Picozzi, J. van den Brink

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Abstract

We show that charge ordered rare-earth nickelates of the type RNiO3 (R=Ho, Lu, Pr and Nd) are multiferroic with very large magnetically-induced ferroelectric (FE) polarizations. This we determine from first principles electronic structure calculations. The emerging FE polarization is directly tied to the long-standing puzzle of which kind of magnetic ordering is present in this class of materials: its direction and size indicate the type of ground-state spin configuration that is realized. Vice versa, the small energy differences between the different magnetic orderings suggest that a chosen magnetic ordering can be stabilized by cooling the system in the presence of an electric field.
Original languageUndefined
Pages (from-to)156401/1-156401/4
Number of pages4
JournalPhysical review letters
Volume103
Issue number15
DOIs
Publication statusPublished - 2009

Keywords

  • IR-73213
  • METIS-259549

Cite this

Giovannetti, G., Kumar, S., Khomskii, D., Picozzi, S., & van den Brink, J. (2009). Multiferroicity in rare-earth nickelates RNiO3. Physical review letters, 103(15), 156401/1-156401/4. https://doi.org/10.1103/PhysRevLett.103.156401