Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 672, Issue -, Pages 543-548Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.153
Keywords
CeO2; Raman spectroscopy; Resistivity and dielectric properties
Categories
Funding
- Council of Science and Industrial Research (India), New Delhi
Ask authors/readers for more resources
Present study reports the structural and dielectric properties of Ce1-xMnxO2 (0 <= x <= 0.15) compounds synthesized by solid state reaction method. X-ray diffraction and Raman measurements confirm the formation of cubic phase corresponding to Fm3m space group for all these compositions investigated. The transition metal Mn ions exhibit multivalency nature in oxides and doping these ions at Ce sites in CeO2 which is also known to exist in 3+ and 4+ valency state is expected to modify the physical properties. The crystallite size was found to decrease with Mn concentration up to 7%, however, it increases at higher Mn concentration i.e., x = 0.15 which is also confirmed by the images from Scanning Electron Microscope. Raman study reveals red shift in peaks at similar to 462.9 cm(-1) and similar to 572.9 cm(-1) upto x = 0.07, whereas the blue shift was observed from these peaks for x = 0.15. The electrical resistivity measured as a function of temperature (200 K-380 K) indicates an increase in resistivity with Mn doping. Furthermore, the dielectric measurements performed with varying frequency as well as temperature shows an enhancement in dielectric constant and decrease in the dielectric loss with Mn concentration. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available