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

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

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
Volume403
Issue number5-9
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

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

Keywords

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

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