Soft-X-ray momentum microscopy of nonlinear magnon interactions below 100-nm wavelength

Soft-X-ray momentum microscopy of nonlinear magnon interactions below 100-nm wavelength | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Soft-X-ray momentum microscopy of nonlinear magnon interactions below 100-nm wavelength Steffen Wittrock, Christopher Klose, Salvatore Perna, Korbinian Baumgaertl, and 9 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7217712/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Magnons represent quantised collective motions of long-range ordered spins. For wavelength below 100 nm, exchange interactions dominate their physics, which gives rise to a so far unexplored regime of nonlinearities and couplings between magnons and other quasiparticles. Besides their selective excitation, also the detection of such short-wavelength spin waves remains a challenge of current research and technology. Here, we probe the intensity and wave vector of magnons by means of quasi-elastic, resonant magnetic soft-X-ray scattering. This magnon momentum microscopy (MMM) can access magnons directly in momentum space with remarkable sensitivity and high photon efficiency up to THz frequencies and down to few-nanometre wavelengths. The two-dimensional information obtained by this light-scattering-based technique is especially valuable for studying the nonlinear interactions of exchange-dominated magnons within technologically relevant thin-film samples. In doing so, we uncover a rich variety of deeply nonlinear magnon interactions, highlighting their potential for applications in novel computing schemes. With its intrinsic element-selectivity and ability to probe also buried layers, soft-X-ray MMM has the potential to establish itself as an advanced tool for ultrabroadband studies of short-wavelength magnonics. Physical sciences/Nanoscience and technology/Techniques and instrumentation/Imaging techniques Physical sciences/Nanoscience and technology/Nanoscale devices/Magnetic devices Physical sciences/Physics/Condensed-matter physics/Spintronics Physical sciences/Physics/Techniques and instrumentation/Imaging techniques Physical sciences/Nanoscience and technology/Nanoscale materials/Magnetic properties and materials spin waves magnons soft X-ray scattering nonlinear magnonics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files MMMpowerseries.mp4 Power Sweep MMMfrequencyseries.mp4 Frequency Sweep Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7217712","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":492004763,"identity":"852f4f29-906c-4e49-9f7f-1d318b15df66","order_by":0,"name":"Steffen 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