Pressure-induced commensurate order in TbMn2 O5 and DyMn2 O5: Influence of rare-earth anisotropy and 3 d - 4 f exchange

M. Deutsch, W. Peng, P. Foury-Leylekian, V. Balédent, S. Chattopadhyay, M. T. Fernandez-Diaz, T. C. Hansen, A. Forget, D. Colson, M. Greenblatt, M. B. Lepetit, S. Petit, I. Mirebeau

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Abstract

The magnetic structure of TbMn2O5 and DyMn2O5 multiferroics has been studied by high-pressure neutron diffraction in a large pressure range up to 6.6 GPa. In both cases, we observe a pressure-induced commensurate magnetic phase with propagation vector 12012, growing with pressure at the expense of the ambient pressure phases. Being previously observed in YMn2O5 and PrMn2O5, this phase is most likely a generic feature of the RMn2O5 multiferroic family. A simple model is proposed to explain qualitatively the emergence of this pressure-induced phase. Differences between TbMn2O5 and DyMn2O5 behaviors at ambient and low pressures provide clues on the interaction scheme.

Original languageEnglish (US)
Article number024408
JournalPhysical Review B
Volume98
Issue number2
DOIs
Publication statusPublished - Jul 10 2018

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Deutsch, M., Peng, W., Foury-Leylekian, P., Balédent, V., Chattopadhyay, S., Fernandez-Diaz, M. T., ... Mirebeau, I. (2018). Pressure-induced commensurate order in TbMn2 O5 and DyMn2 O5: Influence of rare-earth anisotropy and 3 d - 4 f exchange. Physical Review B, 98(2), [024408]. https://doi.org/10.1103/PhysRevB.98.024408