Author(s)

Inas Kamal Batttisha^1*, Ibrahim Sayed Ahmed Farag¹, Mostafa Kamal², Mohamed Ali Ahmed³, Emad Girgis¹, Fawzi El Desouki¹, Hesham Azmi El Meleegi⁴, Fawzi El Desouki¹

¹National Research Centre (NRC), Solid State Physics Department, 33 Bohouth St, Dokki, Giza, Egypt.
²Metal Physics Laboratory, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
³Materials Science Lab (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt.
⁴National Research Centre (NRC), Thin Film Lab, Electron Microscope Department, 33 Bohouth St, Dokki, Giza, Egypt.

BiFe_1-xCo_xO₃ (x = 0, 0.03, 0.05 and 0.1) symbolic as (BFO, BF3CO, BF5CO and BF10CO) in powder form has been prepared by sol-gel technique using ethylenediamine tetraacetic acid (EDTA) as a chelating agent. X-ray diffraction (XRD) and FTIR analysis showed rhombohedra distorted BiFeO₃ structure with compressive lattice distortion induced by the Co substitution at Fe sites. The transmission electron microscope (TEM) shows irregular particles. The additive of cobalt oxide has led to grains refining giving the following crystallite sizes of 18 nm for BF5Co. The scanning electron microscope (SEM) study reveals that the samples morphology shows relatively uniform grain size distribution. The dielectric properties of BiFeO₃ nano-particles in the frequency range of 1 up to 5 MHz at RT revealed that the A.C. conductivity of the prepared samples reaches its maximum value in BF5CO. By decreasing BiFeO₃ particle size as a result of doping with different Co ion concentrations, an enhancement in magnetization and a simultaneous suppression in current leakage occurred. The remnant magnetization Mr of BiFe_1-xCo_xO₃ (x = 0, 0.03, 0.05, 0.1) ceramics significantly enhanced, which provides potential applications in information storage.

Nano-Structure, Multiferroic, BiFe_1-xCo_xO₃ (x = 0, 0.03, 0.05, 0.1), XRD, FTIR, TEM, Remnant Magnetization

Batttisha, I. , Farag, I. , Kamal, M. , Ahmed, M. , Girgis, E. , Desouki, F. , Meleegi, H. and Desouki, F. (2015) Dielectric and Magnetic Properties of Nano-Structure BiFeO₃ Doped with Different Concentrations of Co Ions Prepared by Sol-Gel Method. New Journal of Glass and Ceramics, 5, 59-73. doi: 10.4236/njgc.2015.53008.