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arXiv 1010.5340cond-mat.str-elcond-mat.stat-mech
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用中子衍射法测定了蓝铜矿Cu $_3$(CO $_3$)$_2$(OH)$_2$的磁性和晶体结构

The magnetic and crystal structure of azurite Cu$_3$(CO$_3$)$_2$(OH)$_2$ as determined by neutron diffraction

K. C. Rule, M. Reehuis, M. C. R. Gibson, B. Ouladdiaf, M. J. Gutmann, J. -U. Hoffmann, S. Gerischer, D. A. Tennant, S. Süllow, M. Lang

摘要:

在这里,我们提出的矿物蓝铜矿的中子衍射结果。我们发现蓝铜矿的晶体结构可以用空间群$P2_1$来描述,它是早期工作中发现的$P2_1/c$的次低对称群。这种对称性的微小变化不会对晶格参数或原子分数坐标产生很大影响,这些参数或原子分数坐标在这里用于单晶衍射细化。这种材料的有序磁矩结构已被确定,并由两个不相等的磁矩在铜网站的幅度为0.68(1)和0.25(1)$μ_{B}$。这一结果进行了讨论的各向异性交换和Dzyaloshinskiii-Moriya相互作用。结果表明,尽管该体系具有长程有序的基态,但仍可能是一维的。我们还强调了这种材料中的应变的重要性,这种材料与磁性强耦合。

英文摘要:

Here we present neutron diffraction results on the mineral azurite. We have found that the crystal structure of azurite can be described in the space group $P2_1$ which is the next lower symmetric group of $P2_1/c$ as found in earlier work. This small change in symmetry does not greatly influence the lattice parameters or atomic fractional coordinates which are presented here for single crystal diffraction refinements. The ordered magnetic moment structure of this material has been determined and is comprised of two inequivalent magnetic moments on copper sites of magnitude 0.68(1) and 0.25(1) $μ_{B}$. This result is discussed in terms of the anisotropic exchange and Dzyaloshinskii-Moriya interactions. It is found that the system is likely governed by one-dimensional behaviour despite the long-range ordered ground state. We also highlight the significance of strain in this material which is strongly coupled to the magnetism.

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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