Basith, M. A.6; Ngo, Duc-The1; Quader, A.6; Rahman, M. A.6; Sinha, B. L.4; Ahmmad, Bashir5; Hirose, Fumihiko5; 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 Technology
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.