Understanding topological spin textures is important because of scientific interests and technological applications. However, observing nanoscale magnetization and mapping out their interactions in 3D have been challenging–due to the lack of nondestructive vector nanoimaging techniques that penetrate thick samples. Recently, we developed a new characterization technique, soft x-ray vector ptycho-tomography, to image spin textures with a 3D vector spatial resolution of 10 nm. Using 3D magnetic metamaterial as an example, we demonstrated the creation and observation of topological magnetic monopoles and their interactions. We expect this method to be applied broadly to image vector fields in magnetic samples and beyond.
The measurement and control of nanoscale spin dynamics is essential for the understanding and development of quantum materials. We present a new instrument along with precise spectroscopic measurements of ultrafast magnetic phenomena using extreme ultraviolet high harmonic sources. Our unique instrument allows us to optically control and probe spin dynamics of complex magnetic materials with element specificity on few-femtosecond timescales on up.
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