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Partial ferromagnetic ordering and indirect exchange interaction in the spatially anisotropic kagome antiferromagnet Cs_2Cu_3CeF_(12)

机译:空间各向异性Kagome反铁磁体Cs_2Cu_3CeF_(12)中的部分铁磁排序和间接交换相互作用

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摘要

We report the crystal structure and unconventional magnetic ordering of Cs_2Cu_3CeF_(12), which is composed of buckled kagome lattice of Cu~(2+) ions. The exchange network in the buckled kagome lattice is fairly anisotropic, so that the present spin system can be divided into two subsystems: alternating Heisenberg chains with strong antiferromagnetic exchange interactions and dangling spins. Although the direct exchange interactions between neighboring spins were found to be all antiferromagnetic, ferromagnetic magnetic ordering of the dangling spins was observed. Magnetization exhibits a plateau at one-third of the saturation magnetization. These observations can be understood in terms of the indirect interaction between dangling spins mediated by the chain spin.
机译:我们报道了Cs_2Cu_3CeF_(12)的晶体结构和非常规的磁有序性,它由Cu〜(2+)离子的弯曲的kagome晶格组成。弯曲的kagome晶格中的交换网络是相当各向异性的,因此,当前的自旋系统可以分为两个子系统:具有强反铁磁交换相互作用的交替的海森堡链和悬挂的自旋。尽管发现相邻自旋之间的直接交换相互作用都是反铁磁的,但观察到了悬挂自旋的铁磁磁有序。磁化强度在饱和磁化强度的三分之一处呈现平稳状态。这些观察可以通过链自旋介导的悬空自旋之间的间接相互作用来理解。

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  • 来源
    《Physical review》 |2009年第10期|29-32|共4页
  • 作者单位

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

    Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    inorganic compounds; static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.);

    机译:无机化合物静态特性(阶数参数;静态磁化率;热容量;临界指数等);

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