Crystal structure and magnetic properties of hexagonal RMnO3 (R = Y, Lu, and Sc) and the effect of doping

T. Katsufuji, M. Masaki, A. Machida, M. Moritomo, K. Kato, E. Nishibori, M. Takata, M. Sakata, K. Ohoyama, K. Kitazawa, H. Takagi

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Abstract

A ferroelectricity-magnetism-coexisting system, hexagonal RMnO3 (R = Y, Lu, and Sc), has been investigated by synchrotron x-ray and neutron powder diffraction measurements. It is found from x-ray diffraction measurements that the ferroelectric polarization originates from the tilting of MnO5 polyhedra and the buckling of R layers, which persists up to 1000 K. Neutron diffraction measurements have revealed the reduction of ordered moments from the expected value, as well as strong magnetic diffuse scattering existing far above TN, both of which are caused by geometrical frustration of the triangular lattice of Mn ions. We have also investigated the effects of Zr doping into the R site and have found that Zr doping drastically suppresses both ferroelectric distortion and magnetic ordering.

Original languageEnglish
Article number134434
Pages (from-to)1344341-1344348
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number13
Publication statusPublished - 2002 Oct 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Katsufuji, T., Masaki, M., Machida, A., Moritomo, M., Kato, K., Nishibori, E., Takata, M., Sakata, M., Ohoyama, K., Kitazawa, K., & Takagi, H. (2002). Crystal structure and magnetic properties of hexagonal RMnO3 (R = Y, Lu, and Sc) and the effect of doping. Physical Review B - Condensed Matter and Materials Physics, 66(13), 1344341-1344348. [134434].