Room temperature optical and dielectric properties of Sr and Ni doped lanthanum ferrite nanoparticles

Journal Article · Wed Jun 24 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917689· OSTI ID:22490246

Naseem, Swaleha; Khan, Wasi; Singh, B. R.; Naqvi, A. H. ^[1]

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1. Centre of Excellence in Materials Science (Nanomaterials), Department of Applied Physics, Z.H. College of Engg. & Technology, Aligarh Muslim University, Aligarh 202002 (India)

Strontium and nickel doped lanthanum ferrite (LaFeO{sub 3}) nanoparticles (NPs) were prepared reverse micelle (RM) and calcinated at 700°C. Microstructural studies were carried by XRD and SEM/EDS techniques. The results of structural characterization show the formation of all samples in single phase without any impurity. Optical properties were studied by UV- visible spectroscopy and band gap energy was estimated 3.89 eV. Room temperature dielectric constant (ε’) decreases abruptly at lower frequencies owing to the charge transport relaxation time. The observed behavior of the dielectric properties can be attributed on the basis of Koop’s theory based on Maxwell-Wagner’s two layer model in studied nanoparticles.

• OSTI ID: 22490246
• Journal Information: AIP Conference Proceedings, Vol. 1665, Issue 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
CHARGE TRANSPORT
DOPED MATERIALS
ENERGY GAP
EV RANGE
FERRITES
LANTHANUM COMPOUNDS
LAYERS
MICROSTRUCTURE
NANOPARTICLES
NICKEL COMPOUNDS
OPTICAL PROPERTIES
PERMITTIVITY
RELAXATION TIME
SCANNING ELECTRON MICROSCOPY
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION