Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO3

J. Sato*, H. Lee, T. Katsufuji, M. Masaki, S. Park, D. Copley, H. Takagi

*この研究の対応する著者

研究成果査読

2 被引用数 (Scopus)

抄録

We used inelastic neutron scattering to show that well below its Néel temperature, TN, the two-dimensional (2D) XY nearly triangular antiferromagnet YMnO3 has a prominent central peak associated with 2D antiferromagnetic fluctuations with a characteristic lifetime of 0.55(5) ps, coexisting with the conventional long-lived spin waves. Existence of the two time scales suggests competition between the Néel phase favored by weak interplane interactions, and the Kosterlitz-Thouless phase intrinsic to the 2D XY spin system.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
68
1
DOI
出版ステータスPublished - 2003

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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