The Effect of Ba Doping on the Structural, Optical, Magnetic, and Dielectric Properties of BiFeO{sub 3} Nanoparticles
Nanoparticles (Nps) of Ba (0, 1 to 5 at.%)-doped BiFeO{sub 3} were synthesized by a sol-gel route at 100 °C using tartaric acid as a chelating agent. The obtained results were studied by using XRD, SEM with EDAX, TEM, UV-vis diffusion reflectance spectra, VSM, and impedance analyzer. EDAX spectra confirmed the presence of Bi, Ba, and Fe in the samples. X-ray diffraction studies showed that BiFeO{sub 3} and Bi{sub 1−x}Ba{sub x}FeO{sub 3} samples exhibited the expected rhombohedral perovskite structure up to a Ba concentration of 3%, whereas 4 and 5% of Ba concentration exhibited the tetragonal phase. TEM studies indicate the particle sizes in the range of 08–28 nm. Reflectance spectra measurements showed a decrease in band gap with increasing Ba concentration. Magnetic properties indicated that the undoped BiFeO{sub 3} and Ba-doped BiFeO{sub 3} samples were ferromagnetic at room temperature. The dielectric constant (ε{sup ′}) and loss (ε{sup ″}) show large dispersion behavior. The dielectric constant increases with an increase of dopant concentration, but a very high value of the dielectric constant was noticed for x = 0.05.
- OSTI ID:
- 22773826
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 9; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM
BISMUTH COMPOUNDS
CHELATING AGENTS
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DOPED MATERIALS
FERRITES
MAGNETIC PROPERTIES
NANOPARTICLES
OPTICAL PROPERTIES
PARTICLE SIZE
PEROVSKITE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
TARTARIC ACID
TRANSMISSION ELECTRON MICROSCOPY
TRIGONAL LATTICES
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION