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Structural, magnetic and electric properties of Nd and Ni co-doped BiFeO3 materials

1 Department of Physics, Hanoi University of Mining and Geology, Duc Thang Ward, North Tuliem District, Hanoi, Vietnam
2 Center for Nano science and Technology, Physics Faculty, Hanoi National University of Education, 136 Xuan Thuy Road, Hanoi, Vietnam

Topical Section: Ceramics

Multiferroic Bi1−xNdxFe0.975Ni0.025O3 (x = 0.00, 0.05, 0.10, 0.125, and 0.15) (BNFNO) and BiFeO3 (BFO) materials were synthesized by a sol-gel method. Crystal structure, ferromagnetic and ferroelectric properties of the as-synthesized materials were investigated. Results showed that Nd3+ and Ni2+ co-doping affected to the electrical leakage, enhanced ferroelectric polarization and magnetization of BiFeO3. Co-doped sample with 12.5 mol% of Nd3+ and 2.5 mol% of Ni2+ exhibited an enhancement in both ferromagnetism and ferroelectric properties up to MS ~ 0.528 emu/g and PS ~ 18.35 μC/cm2 with applied electric field at 5 kV/cm, respectively. The origins of ferromagnetism and ferroelectricity enhancement were discussed in the paper.
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