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arXiv 1808.04656cond-mat.mes-hall
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磁性纳米线和纳米管

Magnetic nanowires and nanotubes

Michal Stano, Olivier Fruchart

摘要:

本文综述了磁性圆柱形纳米线和纳米管的合成、磁性及其应用。“纳米”我们认为直径合理地小于微米。在这个尺度上,与微磁和传输长度尺度相比,出现了新的特性。同时,由于所涉及的自由度有限,这使得底层物理更容易理解。这些物体的三维性质和曲率也有助于它们的特定属性,与图案平面元素相比。虽然纳米线和后来的纳米管的话题在几十年前就开始了,但由于合成,理论和表征工具的进步,它仍然蓬勃发展。这使得人们可以访问更复杂的功能结构,并将重点从大型组件的材料类型测量转移到单一对象的研究。我们首先概述了常见的制造方法,产生纳米线,纳米管和结构的几何形状(直径,形状的变化)或材料(段,核壳结构),形状或核壳工程。然后,我们回顾它们的磁性:全球测量,磁化状态和开关,单畴壁静态和动态,和自旋波。对于每一个方面,理论和实验都进行了调查。我们还提到了对这些有用的标准表征技术。最后,我们提到了新兴的应用磁性纳米线和纳米管,随着该主题的预期前景。

英文摘要:

We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By "nano" we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry~(change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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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