Spontaneous Enhancement of Dzyaloshinskii-Moriya Interaction via Field-Cooling-Induced Interface Engineering in 2D Ferromagnetic ternary Tellurides

Spontaneous Enhancement of Dzyaloshinskii-Moriya Interaction via Field-Cooling-Induced Interface Engineering in 2D Ferromagnetic ternary Tellurides | 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 Spontaneous Enhancement of Dzyaloshinskii-Moriya Interaction via Field-Cooling-Induced Interface Engineering in 2D Ferromagnetic ternary Tellurides Ting Yu, Shian Xia, Yan Luo, Iftikhar Ahmed Malik, Xinyi Zhou, and 10 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7692872/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 The emergence of two-dimensional (2D) van der Waals (vdW) ferromagnets has opened new avenues for exploring topological spin textures and their applications in next-generation spintronics. Among these materials, Fe3GaTe2 (FGaT) emerges as a model system due to its room-temperature skyrmion phases, which are stabilized by strong Dzyaloshinskii-Moriya interaction (DMI). However, the atomistic origins of DMI in centrosymmetric vdW lattices remain elusive. Here, we report a spontaneous DMI enhancement mechanism driven by field cooling (FC) in FGaT and its analog Fe3GeTe2 (FGeT). Combining Raman spectroscopy and scanning transmission electron microscopy (STEM), we reveal that the commonly used FC process causes the irreversible precipitation of FeTe2 thin layers at the surfaces of the annealed FGaT. The resulted FeTe2/FGaT heterostructure breaks the inversion symmetry and significantly enhances the DMI. Similar phenomenon has been observed in the family ferromagnetic material FGeT as well, indicating the universality of this mechanism. Additionally, we note there is a threshold thickness of FGaT for the effective precipitation of FeTe2 and further formation of skyrmions. Based on our new findings and to further demonstrate the application potential of FGaT in future spintronics, we successfully develop a facile technique to write and pattern single skyrmions in FGaT at room temperature and without FC process. The discovery provide new insights into the mechanisms behind the origin of the DMI and manipulation of skyrmions in ternary tellurides, paving the way for advanced spintronic applications. Physical sciences/Materials science/Condensed-matter physics/Magnetic properties and materials Physical sciences/Physics/Condensed-matter physics/Phase transitions and critical phenomena Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryInformation.pdf Spontaneous Enhancement of Dzyaloshinskii-Moriya Interaction via Field-Cooling-Induced Interface Engineering in 2D Ferromagnetic ternary Tellurides 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-7692872","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":520653717,"identity":"bbc65b68-c84a-40ca-b5c0-3f49f8a59138","order_by":0,"name":"Ting 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Among these materials, Fe3GaTe2 (FGaT) emerges as a model system due to its room-temperature skyrmion phases, which are stabilized by strong Dzyaloshinskii-Moriya interaction (DMI). However, the atomistic origins of DMI in centrosymmetric vdW lattices remain elusive. Here, we report a spontaneous DMI enhancement mechanism driven by field cooling (FC) in FGaT and its analog Fe3GeTe2 (FGeT). Combining Raman spectroscopy and scanning transmission electron microscopy (STEM), we reveal that the commonly used FC process causes the irreversible precipitation of FeTe2 thin layers at the surfaces of the annealed FGaT. The resulted FeTe2/FGaT heterostructure breaks the inversion symmetry and significantly enhances the DMI. Similar phenomenon has been observed in the family ferromagnetic material FGeT as well, indicating the universality of this mechanism. Additionally, we note there is a threshold thickness of FGaT for the effective precipitation of FeTe2 and further formation of skyrmions. Based on our new findings and to further demonstrate the application potential of FGaT in future spintronics, we successfully develop a facile technique to write and pattern single skyrmions in FGaT at room temperature and without FC process. 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