Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/95677
Title: Effect of la on the structure and characteristics of multiferroic BiFeO3
Authors: Dao, Son Lam
Dinh, Chi Linh
Ta, Ngoc Bach
Dang, Duc Dung
Ngo, Thu Huong
Tran, Dang Thanh
Keywords: Multiferroic
Magnetic property
Ferroelectric property
Optical property
Issue Date: 2022
Series/Report no.: Vietnam Journal of Science and Technology;Vol.60, No.03 .- P.468-477
Abstract: Bi1-xLaxFeO3 (x = 0, 0.1, 0.2, 0.3) ceramics with a particle size of about 100 nm were prepared by high energy ball milling method and annealed at 800 oC in air for 6 h. Effects of La substitution on the structural, magnetic, ferroelectric, and optical properties of BiFeO3 were examined in detail and systematically. The results indicate that partial replacement of Bi3+ by La3+ contributes to the formation of hexagonal single phase. Due to the increase of La3+ ion content, the values of the remnant polarization (Pr) and the coercive field (Ec) are improved, the maximum values achieved is about 0.0036 µC/cm2 and 0.57 kV/cm, respectively, for sample x = 0.2. For increasing La doped content in BiFeO3, the value of coercivity magnetic field (Hc) tends to decrease gradually. The optical property of Bi1-xLaxFeO3 ceramics was studied by analyzing their UV-vis absorption spectra. The value of band gap energy (Eg) of materials decreases from 1.86 to 1.78 eV, corresponding to x = 0 - 0.2, and the broad absorption band in the wavelength range of 660-700 nm. The observed characteristics of La-doped BiFeO3 may be helpful for the further search for high-performance lead-free multiferroic magnetoelectric materials, oriented toward applications in solar cells, optoelectronic devices, or in the environmental pollution treatment technology field by the photocatalytic reaction.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/95677
ISSN: 2525-2518
Appears in Collections:Vietnam journal of science and technology

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