Unconventional spin order in the triangular lattice system NaCrO2: A neutron scattering study
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- 作者：D. Hsieh ; D. Qian ; R.F. Berger ; R.J. Cava ; J.W. Lynn ; Q. Huang ; M.Z. Hasan
- 关键词：NaCrO2 ; Triangular lattice ; Low dimensional magnetism ; Neutron scattering
- 刊名：Physica B
- 出版年：2008
- 出版时间：1 April 2008
- 年：2008
- 卷：403
- 期：5-9
- 页码：1341-1343
- 全文大小：241 K
文摘
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 ack"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVH-4R29FMC-Y&_mathId=mml5&_user=10&_cdi=5535&_rdoc=227&_acct=C000050221&_version=1&_userid=10&md5=9a63df2c818b6bd8392065e193956bb2"" title=""Click to view the MathML source"">Tc. Our results show that at ack"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVH-4R29FMC-Y&_mathId=mml6&_user=10&_cdi=5535&_rdoc=227&_acct=C000050221&_version=1&_userid=10&md5=3b662165154b18ad8dd2aeb68af01891"" title=""Click to view the MathML source"">Tc purely two-dimensional quasi-static spin correlations of the 120° type exist. Below some cross-over temperature ack"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVH-4R29FMC-Y&_mathId=mml7&_user=10&_cdi=5535&_rdoc=227&_acct=C000050221&_version=1&_userid=10&md5=e9d7101c642b8a5482e153fe20ff1255"" title=""Click to view the MathML source"">(T![]()
ntities/223c.gif"" alt=""not, vert, similar"" border=0>0.75Tc) 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 ack"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVH-4R29FMC-Y&_mathId=mml8&_user=10&_cdi=5535&_rdoc=227&_acct=C000050221&_version=1&_userid=10&md5=acd9993f86eca6d55fc252a015448066"" title=""Click to view the MathML source"">0.75Tc.