Tunable multifunctionality in aliovalent substituted Bi12MnO20 sillenite for thermistor and other fascinating applications

Tunable multifunctionality in aliovalent substituted Bi12MnO20 sillenite for thermistor and other fascinating applications | 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 Research Article Tunable multifunctionality in aliovalent substituted Bi 12 MnO 20 sillenite for thermistor and other fascinating applications Harshavardhan Chouhan, Upasana Basumatary, Rimpi Chakravarty, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9030792/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract A new aliovalent-substituted Bi₁₂MnO₂₀ sillenite is synthesized incorporating solid-state reaction route at optimized temperature 800°C. Structural analysis through Fullprof Rietveld refinement of XRD data confirmed a cubic I 23 structure with lattice and reliability parameters a = 10.105 Å and (R p = 9.05%, R wp = 15.95%, R exp = 12.11% and χ 2 = 1.74) respectively. The Williamson-Hall analysis indicated 1.344 nm crystallites and 0.0162 strain. The microstructural analysis through SEM displayed polycrystalline morphology with blocky, agglomerated grains with average grain size 255 nm. The color mapping of EDX spectra verified the expected elements in the system. The FTIR analysis gives the blueprint of sillenite vibrations in the wave number range 400–600 cm⁻¹. UV-Vis spectroscopy revealed strong 317 nm absorbance and a 2.31 eV direct bandgap in the synthesized sample. Dielectric responses followed the Maxwell-Wagner model, with temperature-activated polaron hopping, non-Debye relaxation, NTCR feature, and multi-interface contributions evident in Impedance/Modulus spectra. Conductivity adhered to Jonscher's power law, enhanced by aliovalent substitution with Mn at tetrahedral site. I-V characteristics confirmed n-type semiconducting behavior, with a thermistor coefficient β = 4157.3 K obtained through fitting Steinhart-Hart equation. Magnetic analysis features weak ferromagnetism with M R = 0.005 emu/g, H c = 115.84 Oe and M s = 0.839 emu/g obtained via Grosinger's LAS model. These properties highlight potential of the synthesized sillenite material in UV photocatalytic, thermistors and magneto-electric devices oriented applications. Hard Condensed-matter Physics Materials Engineering Sillenite oxide Thermistor UV-Visible Weak Ferromagnetism Full Text Additional Declarations The authors declare no competing interests. Table 1 to 3 are available in the Supplementary Files section. Supplementary Files Tablefile.docx Table 1: The details of Bragg’s planes and Bragg’s angles for both the phases obtained through Fullproof Reitveld refinement of XRD data. Table 2: The details of atomic positions, structure & reliability parameters obtained through Fullproof Reitveld refinement of XRD data Table 3: The values of the parameters obtained through LAS plotting on the investigated VSM data Cite Share Download PDF Status: Posted 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-9030792","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":600657447,"identity":"4cd41832-55c9-4361-8938-ad36d2982b43","order_by":0,"name":"Harshavardhan Chouhan","email":"","orcid":"","institution":"Central Institute of Technology, Kokrajhar","correspondingAuthor":false,"prefix":"","firstName":"Harshavardhan","middleName":"","lastName":"Chouhan","suffix":""},{"id":600657453,"identity":"cbd9efac-a99e-43c4-94c9-5c6f8bbc63d1","order_by":1,"name":"Upasana Basumatary","email":"","orcid":"","institution":"Kokrajhar University (Erstwhile Kokrajhar Govt. 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College), Kokrajhar","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Sillenite oxide, Thermistor, UV-Visible, Weak Ferromagnetism","lastPublishedDoi":"10.21203/rs.3.rs-9030792/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9030792/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eA new aliovalent-substituted Bi₁₂MnO₂₀ sillenite is synthesized incorporating solid-state reaction route at optimized temperature 800°C. Structural analysis through Fullprof Rietveld refinement of XRD data confirmed a cubic \u003cem\u003eI\u003c/em\u003e23 structure with lattice and reliability parameters a = 10.105 Å and (R\u003csub\u003ep\u003c/sub\u003e = 9.05%, R\u003csub\u003ewp\u003c/sub\u003e = 15.95%, R\u003csub\u003eexp \u003c/sub\u003e= 12.11% and χ\u003csup\u003e2 \u003c/sup\u003e= 1.74) respectively. The Williamson-Hall analysis indicated 1.344 nm crystallites and 0.0162 strain. The microstructural analysis through SEM displayed polycrystalline morphology with blocky, agglomerated grains with average grain size 255 nm. The color mapping of EDX spectra verified the expected elements in the system. The FTIR analysis gives the blueprint of sillenite vibrations in the wave number range 400–600 cm⁻¹. UV-Vis spectroscopy revealed strong 317 nm absorbance and a 2.31 eV direct bandgap in the synthesized sample.\u0026nbsp; Dielectric responses followed the Maxwell-Wagner model, with temperature-activated polaron hopping, non-Debye relaxation, NTCR feature, and multi-interface contributions evident in Impedance/Modulus spectra. Conductivity adhered to Jonscher's power law, enhanced by aliovalent substitution with Mn at tetrahedral site. I-V characteristics confirmed n-type semiconducting behavior, with a thermistor coefficient β = 4157.3 K obtained through fitting Steinhart-Hart equation. Magnetic analysis features weak ferromagnetism with M\u003csub\u003eR\u003c/sub\u003e = 0.005 emu/g, H\u003csub\u003ec\u003c/sub\u003e = 115.84 Oe and M\u003csub\u003es\u003c/sub\u003e = 0.839 emu/g obtained via Grosinger's LAS model. These properties highlight potential of the synthesized sillenite material in UV photocatalytic, thermistors and magneto-electric devices oriented applications.\u003c/p\u003e","manuscriptTitle":"Tunable multifunctionality in aliovalent substituted Bi12MnO20 sillenite for thermistor and other fascinating applications","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-03-05 10:49:07","doi":"10.21203/rs.3.rs-9030792/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"61a661f3-da99-4263-a576-350dec92cb04","owner":[],"postedDate":"March 5th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":63923822,"name":"Hard Condensed-matter Physics"},{"id":63923823,"name":"Materials Engineering"}],"tags":[],"updatedAt":"2026-03-05T10:49:07+00:00","versionOfRecord":[],"versionCreatedAt":"2026-03-05 10:49:07","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-9030792","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9030792","identity":"rs-9030792","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}