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首页> 外文期刊>Physical review >Low-temperature heat transport of Nd_2CUO_4: Roles of Nd magnons and spin-structure transitions
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Low-temperature heat transport of Nd_2CUO_4: Roles of Nd magnons and spin-structure transitions

机译：Nd_2CUO_4的低温传热：Nd磁振子和自旋结构转变的作用

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摘要

We report the magnetic-field dependence of thermal conductivity (k) of an insulating cuprate Nd_2CuO_4 at very low temperatures down to 0.3 K. It is found that, apart from the paramagnetic moments scattering on phonons, the Nd~(3+) magnons can act as either heat carriers or phonon scatterers, which strongly depends on the long-range antiferromagnetic transition and the field-induced transitions of spin structure. In particular, the Nd~(3+) magnons can effectively transport heat in the spin-flopped state of the Nd~(3+) sublattice. However, both the magnon transport and the magnetic scattering are quenched at very high fields. The spin reorientations under the in-plane field can be conjectured from the detailed field dependence of k .
机译：我们报告了在低至0.3 K的低温下，绝缘铜酸盐Nd_2CuO_4的导热率（k）的磁场依赖性。发现，除了声子上的顺磁矩散射外，Nd〜（3+）磁振子还可以作为热载体或声子散射体，这在很大程度上取决于远距离反铁磁跃迁和自旋结构的场致跃迁。特别是，Nd〜（3+）磁振子可以在Nd〜（3+）子晶格的自旋翻转状态下有效地传递热量。但是，磁振子传输和磁散射都在非常高的磁场下被淬灭。可以根据k的详细场相关性来推测平面内场下的自旋重定向。

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  • 来源
    《Physical review》 |2011年第17期|p.174518.1-174518.6|共6页
  • 作者

    Z. Y. Zhao; X. M. Wang; B. Ni; Q. J. Li; C. Fan; W. P. Ke; W. Tao; L. M. Chen; X. Zhao; X. F. Sun;

  • 作者单位

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

    Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China;

    School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,Anhui 230026, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    magnetotransport phenomena; materials for magnetotransport;

    机译：磁传输现象;磁运输材料;

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