单晶 MnSi 纳米线中螺旋磁有序的特征。

Signature of helimagnetic ordering in single-crystal MnSi nanowires.

机构信息

Department of Chemistry, University of Wisconsin - Madison, Madison, Wisconsin 53706, USA.

出版信息

Nano Lett. 2010 May 12;10(5):1605-10. doi: 10.1021/nl904042m.

PMID:20387800

Abstract

We report the synthesis, structural characterization, and magnetotransport of single-crystalline nanowires of manganese monosilicide, MnSi. Bulk MnSi has unusual magnetic orderings, helimagnetism, and skyrmions at ambient pressure, and high pressure studies have revealed partial magnetic ordering and non-Fermi liquid behavior. MnSi nanowires were synthesized using chemical vapor deposition of MnCl(2) onto silicon substrates. The morphology, structure, and composition of these nanowires were analyzed using electron microscopy and X-ray spectroscopy. The low-temperature magnetoresistance characteristics of MnSi nanowires reveal the first signature of helimagnetism in one-dimensional nanomaterials.

摘要

我们报告了锰单硅化物 MnSi 的单晶纳米线的合成、结构表征和磁输运。块状 MnSi 在常压下具有异常的磁序、螺旋磁序和斯格明子，而高压研究揭示了部分磁序和非费米液体行为。MnSi 纳米线是通过 MnCl2 在硅衬底上的化学气相沉积合成的。这些纳米线的形貌、结构和组成通过电子显微镜和 X 射线能谱进行了分析。MnSi 纳米线的低温磁阻特性首次在一维纳米材料中显示出螺旋磁序的特征。