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

被引：27

作者：

Hsieh, D. ^{[1
]}

Qian, D. ^{[1
]}

Berger, R. F. ^{[2
]}

Cava, R. J. ^{[2
]}

Lynn, J. W. ^{[3
]}

Huang, Q. ^{[3
]}

Hasan, M. Z. ^{[1
]}

机构：

[1] Princeton Univ, Joseph Henry Labs Phys, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[3] NIST, Ctr Neuron Res, Gaithersburg, MD 20899 USA

来源：

PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 5-9期

关键词：

NaCrO2; triangular lattice; low dimensional magnetism; neutron scattering;

D O I：

10.1016/j.physb.2007.10.295

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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 T-c. Our results show that at T, purely two-dimensional quasi-static spin correlations of the 120 degrees type exist. Below some cross-over temperature (T similar to 0.75T(c)) 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 0.75T(c). (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1341 / 1343

页数：3

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