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arXiv 2303.08673cond-mat.str-el
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伊辛自旋链磁体DyNi $_5$ Ge $_3$中的连续磁序

Successive magnetic orderings in the Ising spin chain magnet DyNi$_5$Ge$_3$

H. Ge, L. Zhang, N. Zhao, J. Yang, L. Wang, L. Zhou, Y. Fu, T. T. Li, Z. M. Song, F. Ding, J. B. Xu, Y. F. Zhang, S. M. Wang, J. W. Mei, X. Tong, P. Miao, H. He… 展开作者

H. Ge, L. Zhang, N. Zhao, J. Yang, L. Wang, L. Zhou, Y. Fu, T. T. Li, Z. M. Song, F. Ding, J. B. Xu, Y. F. Zhang, S. M. Wang, J. W. Mei, X. Tong, P. Miao, H. He, Q. Zhanghang, L. S. Wu, J. M. Sheng

摘要:

本文通过磁化强度、比热和粉末中子衍射测量研究了一种新型稀土基一维伊辛自旋链磁体\DNG。由于晶体电场分裂,磁性Dy离子共享类伊辛基态。由于局域点对称性,这些伊辛矩形成了两个倾斜的磁性亚晶格,这一点通过随角度变化的磁化强度测量得到了进一步的证实。在零磁场下,发现两个连续的反铁磁相变温度分别为$T_{\mathrm{N1}}=6~\rm K$和$T_{\mathrm{N2}}=5~\rm K$。在$T_{\mathrm{N1}}$和$T_{\mathrm{N2}}$之间的这种中间状态中,只有部分矩是静态有序的。还进行了不同温度下的粉末中子衍射实验。确定了$\mathbf{k_{\rm m}}=(0.5,0.4,0.5)$的无公度磁传播矢量。通过不可约表示分析得到的精细自旋组态证实了这些Ising自旋在晶体$ab$ ~平面内是倾斜的。

英文摘要:

In this report, we investigated a new rare earth based one-dimensional Ising spin chain magnet~\DNG~by means of magnetization, specific heat and powder neutron diffraction measurements. Due to the crystalline electrical field splitting, the magnetic Dy ions share an Ising like ground doublet state. Owning to the local point symmetry, these Ising moments form into two canted magnetic sublattices, which were further confirmed by the angle-dependent magnetization measurement. In zero fields, two successive antiferromagnetic phase transitions were found at temperatures $T_{\mathrm{N1}}=6~\rm K$ and $T_{\mathrm{N2}}=5~\rm K$, respectively. Only part of the moments are statically ordered in this intermediate state between $T_{\mathrm{N1}}$ and $T_{\mathrm{N2}}$. Powder neutron diffraction experiments at different temperatures were performed as well. An incommensurate magnetic propagation vector of $\mathbf{k_{\rm m}}=(0.5,0.4,0.5)$ was identified. The refined spin configurations through the irreducible representation analysis confirmed that these Ising spins are canted in the crystal $ab$~plane.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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