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arXiv 1104.5560cond-mat.mtrl-sci
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Mn3TeO6中的新型无公度磁序

New type of incommensurate magnetic ordering in Mn3TeO6

S. A. Ivanov, P. Nordblad, R. Mathieu, R. Tellgren, C. Ritter, N. Golubko, E. D. Politova, M. Weil

摘要:

复合金属氧化物Mn 3 TeO 6表现出与晶体结构相关的结构,并且已经通过化学传输反应以单晶的形式和通过固态反应路线以多晶粉末的形式制备。采用X射线和中子粉末衍射、电子显微镜、量热和磁性测量相结合的方法研究了晶体结构和磁性。室温下该化合物为三方晶系,空间群R3,a = 8.8679(1)<$,c = 10.6727(2)<$。在23 K以下发现了长程磁有序态。这种磁性结构的一个意想不到的特征是几种类型的Mn链。在无公度磁传播矢量k = [0,0,0.4302(1)]的作用下,唯一Mn位分裂为两个磁性不同的轨道。一个轨道形成一个完美的螺旋线与螺旋轴沿c轴,而另一个轨道具有正弦波字符沿c轴。

英文摘要:

The complex metal oxide Mn3TeO6 exhibits a corundum related structure and has been prepared both in forms of single crystals by chemical transport reactions and of polycrystalline powders by a solid state reaction route. The crystal structure and magnetic properties have been investigated using a combination of X-ray and neutron powder diffraction, electron microscopy, calorimetric and magnetic measurements. At room temperature this compound adopts a trigonal structure, space group R3 with a = 8.8679(1) Å, c = 10.6727(2) Å. A long-range magnetically ordered state is identified below 23 K. An unexpected feature of this magnetic structure is several types of Mn-chains. Under the action of the incommensurate magnetic propagation vector k = [0, 0, 0.4302(1)] the unique Mn site is split into two magnetically different orbits. One orbit forms a perfect helix with the spiral axis along the c-axis while the other orbit has a sine wave character along the c-axis.

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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