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arXiv 1810.09201cond-mat.str-el
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Atacamite族中的Kagome量子自旋系统

Kagome quantum spin systems in the atacamite family

Pascal Puphal, Katharina M. Zoch, Joy Désor, Michael Bolte, Cornelius Krellner

摘要:

我们提出了水热合成,以及单晶体的结构和化学分析的化合物EuCu $_{3}$(OH)$_{6}$ Cl $_{3}$,Zn $_{x}$ Cu $_{4-x}$(OH)$_{6}$(NO $_{3}$)$_{2}$和haydeeite,MgCu $_{3}$(OH)$_{6}$ Cl $_{2}$都来自atacamite家庭。对这些系统进行了低至1.8 K的磁性和比热测量。EuCu $_{3}$(OH)$_{6}$ Cl $_{3}$具有在15 K下有序的受抑反铁磁Cu $^{2+}$基态、强各向异性和来自Van Vleck顺磁Eu $^{3+}$贡献的增加的磁化。ZnCu $_{3}$(OH)$_{6}$(NO $_{3}$)$_{2}$在9 K时显示出反铁磁有序,而对钙钛矿单晶的测量证实了在4.2 K时的铁磁有序,易磁化轴在可果梅平面内。这些结果证明,氯铜矿家族提出了一个广泛的一类材料与有趣的磁基态。

英文摘要:

We present the hydrothermal synthesis, as well as structural and chemical analysis of single crystals on the compounds EuCu$_{3}$(OH)$_{6}$Cl$_{3}$, Zn$_{x}$Cu$_{4-x}$(OH)$_{6}$(NO$_{3}$)$_{2}$ and haydeeite, MgCu$_{3}$(OH)$_{6}$Cl$_{2}$ all arising from the atacamite family. Magnetic and specific-heat measurements down to 1.8 K are carried out for these systems. EuCu$_{3}$(OH)$_{6}$Cl$_{3}$ has a frustrated antiferromagnetic Cu$^{2+}$ ground state with order at 15 K, a strong anisotropy and increased magnetization from Van Vleck paramagnetic Eu$^{3+}$ contributions. ZnCu$_{3}$(OH)$_{6}$(NO$_{3}$)$_{2}$ reveals antiferromagnetic order at 9 K and measurements on haydeeite single crystals confirm the ferromagnetic order at 4.2 K with the easy axis within the kagome plane. These results prove that the atacamite family presents a broad class of materials with interesting magnetic ground states.

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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