Unconventional spin order in the triangular lattice system NaCrO2: A neutron scattering study

D. Hsieh, D. Qian, R. F. Berger, R. J. Cava, J. W. Lynn, Q. Huang, M. Z. Hasan

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We report high resolution neutron scattering measurements on the rhombohedrally stacked triangular antiferromagnet NaCrO2 which has recently been shown to exhibit an unusually broad fluctuating cross-over regime extending far below the onset of spin freezing at Tc. Our results show that at Tc purely two-dimensional quasi-static spin correlations of the 120° type exist. Below some cross-over temperature (T ∼ 0.75 Tc) a small incommensuration develops which helps resolve the inter-layer spin frustration and drives short-range three-dimensional magnetic order. This incommensuration assisted dimensional cross-over suggests that inter-layer frustration is responsible for stabilizing the rare 2D correlated phase above 0.75 Tc.

Original languageEnglish (US)
Pages (from-to)1341-1343
Number of pages3
JournalPhysica B: Condensed Matter
Issue number5-9
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • Low dimensional magnetism
  • NaCrO
  • Neutron scattering
  • Triangular lattice

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