Chiral and collinear ordering in a distorted triangular antiferromagnet.
Chiral and collinear ordering in a distorted triangular antiferromagnet.
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DOI：
10.1103/physrevlett.102.037202
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发表时间：
2008-07
影响因子：
8.6
通讯作者：
A. I. Smirnov;L. Svistov;L. A. Prozorova;A. Zheludev;M. Lumsden;E. Ressouche;O. Petrenko;Kouichi Nishikawa;S. Kimura;M. Hagiwara;K. Kindo;A. Shapiro;L. N. Demianets
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文献类型：
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作者：
A. I. Smirnov;L. Svistov;L. A. Prozorova;A. Zheludev;M. Lumsden;E. Ressouche;O. Petrenko;Kouichi Nishikawa;S. Kimura;M. Hagiwara;K. Kindo;A. Shapiro;L. N. Demianets
磁化强度、比热和中子衍射测量用于绘制KFe(MoO4)2的整个磁相图。这种堆叠的三角形反铁磁体在结构上类似于著名的多铁质体系RbFe(MoO4)2。由于一个额外的小晶体畸变，它包含两组不相等的畸变磁三角晶格。结果，自旋网络分解成两个相互嵌入但几乎独立的磁子系统。一种是共线反铁磁体，在外加磁场中表现出简单的自旋翻转行为。另一种是螺旋形网，它经历了一系列奇特的、不相称的相变。在不同的相中，我们可以观察到真正的三维或非常规的准二维有序。
Magnetization, specific heat, and neutron diffraction measurements are used to map out the entire magnetic phase diagram of KFe(MoO4)2. This stacked triangular antiferromagnet is structurally similar to the famous multiferroic system RbFe(MoO4)2. Because of an additional small crystallographic distortion, it contains two sets of inequivalent distorted magnetic triangular lattices. As a result, the spin network breaks down into two intercalated yet almost independent magnetic subsystems. One is a collinear antiferromagnet that shows a simple spin-flop behavior in applied magnetic fields. The other is a helimagnet that instead goes through a series of exotic commensurate-incommensurate phase transformations. In the various phases one observes either true three-dimensional or unconventional quasi-two-dimensional ordering.