Arya, G. S. and Kotnala, R. K. and Negi, N. S. (2013) Structural and multiferroic properties of Bi1-xInxFeO3 (0 <= x <= 0.20) nanoparticles. Journal of Applied Physics , 113 (4). 044107-1 -044107-8. ISSN 0021-8979

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Indium (In)-doped BiFeO3 (BFO) nanoparticles were prepared by an ethylene glycol based sol-gel method using the concept of aging for the formation of pure phase crystal structure. The x-ray diffraction patterns reveal the single phase rhombohedral structure for BFO and In-doped BFO nanoparticles and In substitution (0%-20%) at the Bi site does not transform the crystal structure of BiFeO3. The appearance of metal-oxide absorption bands at 555 cm(-1) and 439 cm(-1) in FTIR spectra confirms the formation of perovskite structure. The doping of In at Bi-site improves the particles surface morphology and reduces the average particles size to around 30 nm which markedly affect the magnetic and electrical properties of these nanoparticles. Saturation magnetization increases from 0.40 emu/gm for BFO nanoparticles to 3.20 emu/gm for 20% In-doped BFO (BFO2) nanoparticles. The coercivity reduces to 78 Oe for BFO2 due to decrease in magnetocrystalline anisotropy. In-doping at Bi- site improves the dielectric properties of BFO and decreases the antiferromagnetic Neel temperature which is due to increased value of magnetoelectric coefficient at room temperature. The resistivity increases with In-doping, and is attributed to reduction of oxygen ion vacancies and cation size effect.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 11 Jun 2020 10:43
Last Modified: 11 Jun 2020 10:43

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