Simple top-down preparation of magnetic Bi0.9Gd0.1Fe1−xTixO3 nanoparticles by ultrasonication of multiferroic bulk material

M. A. Basith, Duc-The Ngo, A. Quader, M. A. Rahman, B. L. Sinha, Bashir Ahmmad, Fumihiko Hirose, Kristian Mølhave

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    Abstract

    We present a simple technique to synthesize ultrafine nanoparticles directly from bulk multiferroic perovskitepowder. The starting materials, which were ceramic pellets of the nominal compositions Bi0.9Gd0.1-Fe1−xTixO3 (x = 0.00–0.20), were prepared initially by a solid state reaction technique, then ground intomicrometer-sized powders and mixed with isopropanol or water in an ultrasonic bath. The particle sizewas studied as a function of sonication time with transmission electron microscopic imaging and electrondiffraction that confirmed the formation of a large fraction of single-crystalline nanoparticles with a meansize of 11–13 nm. A significant improvement in the magnetic behavior of Bi0.9Gd0.1Fe1−xTixO3 nanoparticlescompared to their bulk counterparts was observed at room temperature. This sonication technique may beconsidered as a simple and promising route to prepare ultrafine nanoparticles for functional applications.
    Original languageEnglish
    Article number14336
    JournalNanoscale
    Volume6
    Number of pages7
    ISSN2040-3364
    DOIs
    Publication statusPublished - 2014

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