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Pressure-induced change in the magnetic ordering of TbMnO3

O. L. Makarova, I. Mirebeau, S. E. Kichanov, J. Rodriguez-Carvajal, and A. Forget
Phys. Rev. B 84, 020408(R) – Published 20 July 2011

Abstract

We have studied TbMnO3 by high-pressure neutron diffraction up to 3.6 GPa and down to 1.5 K. The incommensurate spin structures of the Mn and Tb moments are strongly suppressed under pressure, and an E-type commensurate spin structure with (0,1/2,0) propagation vector is stabilized for the Mn moments. The Mn and Tb incommensurate orders which persist at low pressures or low temperatures are also affected, with a change of phase of the modulation between neighboring Mn chains and a reorientation of the Mn moments along the a axis. The results suggest both a change of the balance of the different Mn-Mn interactions and a strengthening of the Tb-Tb (or Tb-Mn) interactions under pressure.

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  • Received 29 April 2011

DOI:https://doi.org/10.1103/PhysRevB.84.020408

©2011 American Physical Society

Authors & Affiliations

O. L. Makarova1,2, I. Mirebeau1,*, S. E. Kichanov3, J. Rodriguez-Carvajal4, and A. Forget5

  • 1CEA, Centre de Saclay, /DSM/IRAMIS/ Laboratoire Léon Brillouin, F-91191 Gif-sur-Yvette, France
  • 2National Research Center “Kurchatov Institute,” 123182 Moscow, Russia
  • 3Frank Laboratory of Neutron Physics, JINR, 141980 Dubna, Russia
  • 4Institut Laue-Langevin, Diffraction Group, BP 156, F-38042 Grenoble Cedex 9, France
  • 5CEA, Centre de Saclay, /DSM/IRAMIS/ Service de Physique de l’Etat Condensé, F-91191 Gif-Sur-Yvette, France

  • *isabelle.mirebeau@cea.fr

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Issue

Vol. 84, Iss. 2 — 1 July 2011

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