Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO3

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

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume68
    Issue number1
    DOIs
    Publication statusPublished - 2003 Jan 1

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    Spin fluctuations
    Inelastic neutron scattering
    Spin waves
    magnons
    inelastic scattering
    neutron scattering
    life (durability)
    Temperature
    temperature

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO3. / Sato, J.; Lee, H.; Katsufuji, Takuro; Masaki, M.; Park, S.; Copley, D.; Takagi, H.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 1, 01.01.2003.

    Research output: Contribution to journalArticle

    Sato, J. ; Lee, H. ; Katsufuji, Takuro ; Masaki, M. ; Park, S. ; Copley, D. ; Takagi, H. / Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO3. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 68, No. 1.
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    AU - Park, S.

    AU - Copley, D.

    AU - Takagi, H.

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