Zeitaufgelöste Mikroskopie von Spinwellenanregungen

自旋波激发的时间分辨显微镜

• 批准号: 113458729
• 负责人: Professor Dr. Georg Woltersdorf
• 金额: --
• 依托单位: Fachgruppe Optik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/113458729?language=en
• 关键词: Zeitaufgel; ste; Mikroskopie; von; Spinwellenanregungen

Within this proposal we would like to combine our expertise in imaging magnetization dynamics with the progress we have made in fabricating and characterizing point contacts suitable for the generation of large amplitude spin waves due to spin transfer effects. We will study the emission characteristics of spin transfer induced spin waves emanating from point contacts. Furthermore, we will study spin wave interference in simple test devices such as spin wave switches. Spin wave propagation in thin ferromagnetic films is not only interesting from a fundamental point of view, but might also become of importance for applications. One example is spin wave logic. Here, the special dispersion relations of spin waves in thin film can be exploited. It is possible to construct magnetic microstructures with areas showing positive dispersion or negative dispersion. The combination of such elements leads to interesting phenomena (spin wave switches, phase shifters etc.) A second example is the construction of phased arrays of spin transfer torque oscillators. The dispersion relations of spin waves need to be taken into account for the development of phase locking mediated by propagating spin waves.

在这个建议中，我们希望结合联合收割机我们在成像磁化动力学的专业知识与我们在制造和表征点接触的进展，适用于产生大振幅自旋波由于自旋转移效应。我们将研究点接触中自旋转移诱导的自旋波的发射特性。此外，我们将研究自旋波干涉在简单的测试设备，如自旋波开关。自旋波在铁磁薄膜中的传播不仅从基本原理的角度来看是令人感兴趣的，而且可能在应用上也变得重要。一个例子是自旋波逻辑。这里，可以利用薄膜中自旋波的特殊色散关系。可以构造具有显示正色散或负色散的区域的磁性微结构。这些元素的组合导致有趣的现象（自旋波开关，移相器等）。第二个例子是自旋转移力矩振荡器的相控阵列的构造。传播自旋波介导的相位锁定的发展需要考虑自旋波的色散关系。