20.500.12556/DiRROS-28538 Mn-induced stabilization of a ▫$\beta$▫-alumina-type defect structure in barium hexaferrite nanoplatelets Hexaferrite nanoplatelets exhibit size-dependent structural variations influencing their magnetic properties. Here, we synthesized Mn-substituted barium ferrite nanoplatelets via hydrothermal methods, achieving up to ∼27% Fe substitution. Advanced STEM and Raman analyses revealed depletion of Fe(2b) trigonal lattice sites and associated oxygen vacancies, forming a β-alumina-type ferrite structure─representing the first pure Ba2+ β-ferrite analogue. First-principles modeling confirmed the thermodynamic stabilization of this defected structure at higher Mn/Fe ratios. Mn substitution reduced nanoplatelet size and suppressed magnetic properties, which were restored upon annealing at 800 °C, reverting to the M-type hexaferrite structure with expected magnetic behavior. These findings elucidate nanoscale structural adaptations induced by chemical substitution and offer insights into tailoring the magnetic properties of barium ferrite nanoplatelets through controlled synthesis and post-treatment. true false true American Chemical Society ZDA Angleški jezik Ni določen © 2026 The Authors. Neznano 2026-03-23 13:31:09 2026-03-23 13:31:09 2026-03-26 04:06:45 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorja iz Slovenije: Matic Poberžnik, Janvit Teržan, Tomaž Mertelj, Damjan Vengust, Goran Dražić, Darja Lisjak, Sašo Gyergyek; Opis vira z dne 23. 3. 2026; str. A-M iss. Vol. 38 [in press] 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-01-14 2026-03-04 2026-03-16 621.7+621.9 1520-5002 10.1021/acs.chemmater.6c00103 272644355 https://pubs.acs.org/doi/full/10.1021/acs.chemmater.6c00103 1 2ccf1f4c-26b4-11f1-aa40-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=42330 RAZ_Makovec_Darko_2026.pdf RAZ_Makovec_Darko_2026.pdf 1 FDD7602D7AEA8B5C38B735FF8289F6D8 c56bfaf5f39d0eda4a3edde031c66b9f7013cfdb8eac1709389942293897cdfa 9d0036e0-26b4-11f1-aa40-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=42332 Institut Jožef Stefan 0 0 0