Structured neutron waves and neutron holography

The development of advanced spintronics materials necessitates novel characterization tools with the ability to analyze nanometer-scale spin textures. Neutrons, with their angstrom-sized wavelengths, electric neutrality, and controllable spin states, are uniquely suited for this task. Recent research has prioritized expanding the capabilities of the "neutron toolbox" to effectively characterize emerging materials. This involves the development of holographic and tomographic techniques for 3D characterization of bulk spin textures, alongside methods for creating structured neutron beams with specific spin-orbit states like helical and skyrmion configurations. Here we provide a concise overview of these advancements, exploring their potential future applications.