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Magnetic ordering of the buckled honeycomb lattice antiferromagnet Ba_2NiTeO_6

机译：弯曲蜂窝晶格反铁磁体Ba_2NiTeO_6的磁排序

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摘要

We investigate the magnetic order of the buckled honeycomb lattice antiferromagnet Ba_2NiTeO_6 and its related antiferromagnet Ba_3NiTa_2O_9 by neutron diffraction measurements. We observe magnetic Bragg peaks below the transition temperatures, and identify propagation vectors for these oxides. A combination of representation analysis and Rietveld refinement leads to a collinear magnetic order for Ba_2NiTeO_6 and a 120° structure for Ba_3NiTa_2O_9. We find that the spin model of the bilayer triangular lattice is equivalent to that of the two-dimensional buckled honeycomb lattice having magnetic frustration. We discuss the magnetic interactions and single-ion anisotropy of Ni~(2+) ions for Ba_2NiTeO_6 in order to clarify the origin of the collinear magnetic structures. Our calculation suggests that the collinear magnetic order of Ba_2NiTeO_6 is induced by the magnetic frustration and easy-axis anisotropy.
机译：我们通过中子衍射测量研究了弯曲的蜂窝晶格反铁磁体Ba_2NiTeO_6及其相关的反铁磁体Ba_3NiTa_2O_9的磁阶。我们观察到转变温度以下的磁布拉格峰，并确定这些氧化物的传播矢量。表示分析和Rietveld精化的结合导致Ba_2NiTeO_6的共线磁阶和Ba_3NiTa_2O_9的120°结构。我们发现双层三角晶格的自旋模型与具有磁阻的二维屈曲蜂窝状晶格的自旋模型等效。我们讨论了Ba_2NiTeO_6的Ni〜（2+）离子的磁性相互作用和单离子各向异性，以阐明共线磁性结构的起源。我们的计算表明，Ba_2NiTeO_6的共线磁阶是由磁阻和易轴各向异性引起的。

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  • 来源
    《Physical review》 |2016年第2期|024412.1-024412.7|共7页
  • 作者

    Shinichiro Asai; Minoru Soda; Kazuhiro Kasatani; Toshio Ono; Maxim Avdeev; Takatsugu Masuda;

  • 作者单位

    Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

    Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

    Department of Physical Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Department of Physical Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Bragg Institute, Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2234, Australia;

    Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

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