Imaging of magnetic excitations in nanostructures with near-field microwave microscopy
Imaging of magnetic excitations in nanostructures with near-field microwave microscopy
复制标题
使用近场微波显微镜对纳米结构中的磁激发进行成像
DOI：
10.1016/j.jmmm.2021.168870
复制
发表时间：
2022
影响因子：
2.7
通讯作者：
Mitch Wallis, T.
中科院分区：
文献类型：
--
作者：
Berweger, Samuel;Tyrell-Ead, Robert;Chang, Houchen;Wu, Mingzhong;Zhu, Na;Tang, Hong X.;Nembach, Hans;Karl Stupic, T.;Russek, Stephen;Mitch Wallis, T.
我们目前的图像中的图案化的钇铁石榴石（YIG）薄膜通过使用近场微波显微镜，它可以实现高达50 nm的空间分辨率。磁激励的可视化是高速、高密度磁逻辑和磁存储应用的一个诱人的前景，它促进了近年来新的磁显微镜和成像技术的发展。在这里，我们提出了一种新的方法，在室温下激发的磁模式的局部成像与亚衍射极限的空间分辨率。这种方法是基于一个特殊的原子力显微镜与宽带GHz的能力成像的空间分布的动态磁激励图案化的磁结构。由于近场扫描探针技术固有的亚波长、纳米尺度的空间分辨率，这种方法具有比光学技术显著提高空间分辨率的潜力。
We present images of spin-wave excitations in a patterned yttrium iron garnet (YIG) thin film obtained by use of near-field microwave microscopy, which can achieve spatial resolution as high as 50 nm. Visualization of magnetic excitations is an enticing prospect for high-speed, high-density magnetic logic and storage applications, which has spurred the development of new magnetic microscopy and imaging techniques in recent years. Here we present a novel approach for local imaging of magnetic modes excited at room temperature with sub-diffraction-limited spatial resolution. This approach is based on a special atomic force microscope with broadband GHz capability for imaging the spatial distribution of dynamic magnetic excitations in patterned magnetic structures. Due to the inherent sub-wavelength, nanometer-scale spatial resolution of near-field scanning probe techniques, this approach has potential for a significant improvement in spatial resolution over optical techniques.