arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.01776cond-mat.mtrl-scicond-mat.str-el
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亚铁磁单斜Mn $_3$ As $_2$的两步磁有序化

Two-step magnetic ordering into a canted state in ferrimagnetic monoclinic Mn$_3$As$_2$

Manohar H Karigerasi, Bao H. Lam, Maxim Avdeev, Daniel P. Shoemaker

摘要:

我们报告的磁性结构的室温稳定,单斜Mn $_3$作为$_2$在3 K和250 K使用中子粉末衍射测量。从磁测量数据,Mn $_3$ As $_2$的居里温度被确认为约270 K。量热分析表明,在225K时存在另一个相变.在270 K时,Mn $_3$ As $_2$在磁空间群$C2/m$(#12.58)中经历$k = 0$亚铁磁有序,Mn矩指向$b$。在225 K以下,在$ac$平面中存在Mn磁矩的倾斜,这产生了空间群为$C2/c$(#15.85)的多$k$非共线磁结构。Mn矩沿$b$方向的分量遵循$k=0$序,沿$a$和$c$方向的分量具有$k = [0 0 \frac{1}{2}]$传播矢量.磁基态随温度的变化提供了一个更深入的了解的因素,管理磁有序锰砷化合物。

英文摘要:

We report the magnetic structure of room-temperature-stable, monoclinic Mn$_3$As$_2$ at 3 K and 250 K using neutron powder diffraction measurements. From magnetometry data, the Curie temperature of Mn$_3$As$_2$ was confirmed to be around 270 K. Calorimetry analysis showed the presence of another transition at 225 K. At 270 K, Mn$_3$As$_2$ undergoes a $k = 0$ ferrimagnetic ordering in the magnetic space group $C2/m$ (#12.58) with Mn moments pointing along $b$. Below 225 K, there is a canting of Mn moments in the $ac$ plane which produces a multi-$k$ non-collinear magnetic structure in space group $C2/c$ (#15.85). The components of Mn moments along $b$ follow $k=0$ ordering and the components along $a$ and $c$ have $k = [0 0 \frac{1}{2}]$ propagation vector. The change in the magnetic ground state with temperature provides a deeper insight into the factors that govern magnetic ordering in Mn-As compounds.

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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