微探针微波-电流注入铁磁共振中纳米结构非均匀共振模响应的增强
Enhancement of the response of non-uniform resonance modes of a nanostructure in the Picoprobe microwave-current injection ferromagnetic resonance
摘要：
磁性薄膜和纳米结构中的非均匀自旋驻波模提供了有关表面和掩埋界面的重要信息。由于对称性的原因，它们经常在记录的铁磁共振谱中缺失。在这项工作中，我们的实验表明，通过微波电流直接注入到一个阵列的坡莫合金纳米带使用一个显微镜微波同轴共面适配器可以有效地激发非均匀的自旋驻波模奇对称。所提出的方法是快速的，并允许容易的空间映射的磁性与分辨率下降到100微米。我们已经验证了这种方法，使用一个例子，从一个周期性阵列的纳米条纹。从直流注入的结果相比，基于微带的FMR测量。
英文摘要：
The non-uniform standing spin-wave modes in thin magnetic films and nanostructures provide important information about surfaces and buried interfaces. Very often they are lacking in the recorded ferromagnetic resonance spectra for symmetry reasons. In this work we experimentally demonstrate that by direct injection of microwave currents into an array of Permalloy nanostripes using a microscopic microwave coaxial to coplanar adaptor one can efficiently excite non-uniform standing spin wave modes with odd symmetry. The proposed method is quick and allows easy spatial mapping of magnetic properties with the resolution down to 100 microns. We have validated this method using an example from a periodical array of nanostripes. The results from direct current injection are compared to that of microstrip-based FMR measurements.
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