Dielectric and magnetic anomalies and spin frustration in hexagonal RMnO3 (R=Y, Yb, and Lu)

T. Katsufuji, S. Mori, M. Masaki, Y. Moritomo, N. Yamamoto, H. Takagi

Research output: Contribution to journalArticle

405 Citations (Scopus)

Abstract

Single crystals of hexagonal RMnO3 (R=Y, Yb, and Lu), where Mn ions form the triangular lattice, were investigated, focusing on their dielectric/magnetic anomalies as well as geometrical spin frustration. It is found that the ratio of a Weiss temperature to TN is ∼10 in RMnO3, indicating the dominant role of strong geometrical frustration. The effect of geometrical frustration also appears in specific heat, which shows a presence of a substantial amount of residual magnetic contribution below TN, indicating that a part of the spins are still fluctuating at T≪TN. It is also found that the dielectric anomaly at TN is strongly anisotropic, suggesting a unique correlation between magnetism and dielectric properties in these compounds.

Original languageEnglish
Article number104419
Pages (from-to)1044191-1044196
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number10
Publication statusPublished - 2001 Sep 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Katsufuji, T., Mori, S., Masaki, M., Moritomo, Y., Yamamoto, N., & Takagi, H. (2001). Dielectric and magnetic anomalies and spin frustration in hexagonal RMnO3 (R=Y, Yb, and Lu). Physical Review B - Condensed Matter and Materials Physics, 64(10), 1044191-1044196. [104419].