Basith, M. A.6; Ngo, Duc-The1; Quader, A.6; Rahman, M. A.6; Sinha, B. L.4; Ahmmad, Bashir7; Hirose, Fumihiko7; Mølhave, Kristian1
1 Department of Micro- and Nanotechnology, Technical University of Denmark2 Molecular Windows, Department of Micro- and Nanotechnology, Technical University of Denmark3 Bangladesh University of Engineering and Technology4 Military Institute of Science and Technology (MIST)5 Yamagata University6 Bangladesh University of Engineering and Technology7 Yamagata University
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.