Journal
PHYSICA B-CONDENSED MATTER
Volume 276, Issue -, Pages 676-677Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4526(99)01520-3
Keywords
antiferromagnetism; correlation lengths; Kosterlitz-Thouless transition; two-dimensional systems
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MnPS3 is a quasi-2D S = 5/2 antiferromagnet on a honeycomb lattice. Using an energy integrating neutron scattering technique, we have measured the structure factor S(k) of the instantaneous magnetic fluctuations. The temperature dependence of the correlation length xi follows the Kosterlitz-Thouless prediction with parameters that are consistently described by a Heisenberg system with inter plane coupling J'/'J = 1/405 and weak xy-anisotropy. (C) 2000 Elsevier Science B.V. All rights reserved.
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