Larkin length as a criterion for antiferromagnetic writing

Larkin length as a criterion for antiferromagnetic writing | 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 Physical Sciences - Article Larkin length as a criterion for antiferromagnetic writing Nikolai Khokhlov, Aleksandr Buzdakov, Timur Gareev, Sheng Li, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9405081/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 Antiferromagnets are emerging as a transformative platform for next-generation spintronics and information storage technologies, promising improved speed and energy efficiency. However, unlike in ferromagnets---where magnetic domain stability is governed by long-range magnetostatic fields---the physical principles defining the minimum writable domain size in antiferromagnets remain poorly understood. Here we identify the Larkin length---the scale at which disorder-induced pinning of domain walls and elastic restoring forces balance---as a key parameter governing the ultimate resolution for stable antiferromagnetic domain writing. We observe that the Larkin length decreases sharply near the Neel transition, enabling deterministic electrical writing of micrometer-scale domains in the archetypal antiferromagnet Cr 2 O 3 . Exploiting this mechanism, we demonstrate Heat-Assisted Antiferromagnetic Recording using picosecond laser heating, as a direct analog of Heat-Assisted Magnetic Recording on ferromagnetic media. These findings establish a framework for understanding domain stability in antiferromagnets and provide practical pathways for deterministic electrical and optical domain writing towards extreme-density ferroic devices. Physical sciences/Physics/Condensed-matter physics/Phase transitions and critical phenomena Physical sciences/Materials science/Condensed-matter physics/Phase transitions and critical phenomena Physical sciences/Physics/Statistical physics, thermodynamics and nonlinear dynamics/Phase transitions and critical phenomena Physical sciences/Physics/Condensed-matter physics/Magnetic properties and materials Physical sciences/Materials science/Condensed-matter physics/Magnetic properties and materials Antiferromagnetism Domain structure Magnetoelectric effect Magnetic memory Ultrafast magnetism Full Text Additional Declarations There is NO Competing Interest. Supplementary Files NATUREemailattachmentSMC17760931471.mp4 SI Video 1 NATUREemailattachmentSMC17760931472.mp4 SI Video 2 NATUREemailattachmentSMC17760931473.mp4 SI Video 3 NATUREemailattachmentSMC17760931474.mp4 SI Video 4 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-9405081","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Physical Sciences - Article","associatedPublications":[],"authors":[{"id":626179027,"identity":"1ec7c748-a53c-40b0-b655-94d2172c2af7","order_by":0,"name":"Nikolai 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