Synthesis of Metal Doped BiFeO3 Nanoparticles and their Dielectric and Magnetic Properties

Bashir Ahmmad; M.A. Basith; Kunihiro Koike; Shigeru Kubota; Fumihiko Hirose

doi:10.4028/www.scientific.net/AMR.1101.187

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Influence of Ingate Thickness and Pouring Temperature on Structure and Fluidity of Cast Hyper-Eutectic Al-18%Si Alloy
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Synthesis of Metal Doped BiFeO₃ Nanoparticles and their Dielectric and Magnetic Properties
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Synthesis of Metal Doped BiFeO₃ Nanoparticles and their Dielectric and Magnetic Properties

Abstract:

Dielectric and magnetic properties of BiFeO₃ samples, co-doped with Gd or Ba and Ti in place of Bi and Fe, respectively, were investigated. The bulk powder samples of nominal compositions of Bi_0.9Gd_0.1Fe_1–xTi_xO₃ and Bi_0.7Ba_0.3Fe_1-xTi_xO₃ (x=0.00-0.25) ceramics were synthesized by conventional solid state reaction technique. The as prepared ceramics showed improved dielectric and magnetic properties. Also, ultrafine nanoparticles of the samples were prepared by milling assisted ultrasonic fragmentation of the bulk powder. The particles size was studied as a function of sonication time with TEM imaging and electron diffraction. These confirmed the formation of a large fraction of single-crystalline Bi_0.9Gd_0.1Fe_1–xTi_xO₃ nanoparticles with a mean size of 11-13 nm. The synthesized nanoparticles exhibit an improved magnetic behavior compared to their bulk counterparts at room temperature. The preparation and characterization of bulk ceramics as well as their nanoparticles were reported.