Synthesis, thermal and magnetic properties of nanoceramics with a multilayer Aurivillius phase type

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2024-12, Vol.310, p.117734, Article 117734
• Main Authors: Lomanova, N.A., Ugolkov, V.L., Volkov, M.P., Yastrebov, S.G.
• Format: Article
• Language: English
• Subjects: Layered perovskite-like compounds; Magnetometry; Mӧssbauer spectroscopy; Nanopowders; Raman spectroscopy; Thermal behavior
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2024.117734

•Synthesis conditions of seven- and the eight-layer BFTO nanocrystals.•Structure and morphology of Bi8Fe4Ti3O24 and Bi9Fe5Ti3O27 nanocrystals.•Thermal behavior of multilayer BFTO nanocrystals.•Bi9Fe5Ti3O27 is a promising magnetically ordered nanomaterial at room temperature. We report the co-precipitation synthesis and properties of nanomaterials with multilayerAurivillius phase structures Bim+1Fem-3Ti3O3m+3 (BFTO). This paper discusses the thermal behavior of materials based on seven-layerand eight-layercompounds and presents their magnetic characteristics. The structure and morphology were characterized using PXRD, helium pycnometry, and SEM/EDX. Thermal analyses were conducted using DSC/TG. The sintering behavior was investigated through dilatometry. Mössbauer spectroscopy revealed that varying the synthesis conditions allows control over the iron distribution within the Aurivillius phase structure. Spin-phonon coupling effects were examined using Raman spectroscopy. The magnetic characteristics were assessed using vibrating-sample magnetometry. The magnetic propertieswere analyzed by measuring the temperature dependence of magnetization and magnetic hysteresis loops. The magnetic experiments demonstrated that the composition has a more significant impact on the BFTO magnetic responsethan the size effect. The results of this study suggest that the obtained materials have promising functional applications.