TY - JOUR
T1 - Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO3
AU - Sato, J.
AU - Lee, H.
AU - Katsufuji, T.
AU - Masaki, M.
AU - Park, S.
AU - Copley, D.
AU - Takagi, H.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.68.014432
DO - 10.1103/PhysRevB.68.014432
M3 - Article
AN - SCOPUS:84879299214
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
ER -