Optically reconfigurable magnetic materials
Optically reconfigurable magnetic materials
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DOI：
10.1038/nphys3325
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发表时间：
2015-06-01
期刊：
影响因子：
19.6
通讯作者：
von Freymann, Georg
中科院分区：
文献类型：
--
作者：
Vogel, Marc;Chumak, Andrii V.;von Freymann, Georg
材料的结构化是控制固体中的波的最一般的方法。由于自旋波-电子自旋系统的本征激发-不受焦耳热的影响，因此它们在一系列应用中受到关注，例如处理（1-5），滤波（6-8）和短时数据存储（9）。尽管所有这些应用都依赖于预定义的恒定结构，但结构的动态变化将提供额外的新颖应用。在这里，我们提出了一种方法，用于生产完全可调的，二维结构的磁性材料。使用激光，我们在磁介质中创建热景观，导致饱和磁化强度的调制和自旋波特性的控制。这种方法是通过实现完全可重构的一维和二维磁振子晶体人工周期磁晶格。
Structuring of materials is the most general approach for controlling waves in solids. As spin waves-eigen-excitations of the electrons' spin system-are free from Joule heating, they are of interest for a range of applications, such as processing(1-5), filtering(6-8) and short-time data storage(9). Whereas all these applications rely on predefined constant structures, a dynamic variation of the structures would provide additional, novel applications. Here, we present an approach for producing fully tunable, two-dimensionally structured magnetic materials. Using a laser, we create thermal landscapes in a magnetic medium that result in modulations of the saturation magnetization and in the control of spin-wave characteristics. This method is demonstrated by the realization of fully reconfigurable one- and two-dimensional magnonic crystals-artificial periodic magnetic lattices.