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

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...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2008-04, Vol.403 (5-9), p.1341-1343
Main Authors: HSIEH, D, QIAN, D, BERGER, R. F, CAVA, R. J, LYNN, J. W, HUANG, Q, HASAN, M. Z
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 deg type exist. Below some cross-over temperature (T0.75Tc) 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 0.75Tc.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2007.10.295