Effect of Transition Metal (Gd, Dy) Co-doping on Structural, Optical, and Magnetic Properties of CeO2 Nanoparticles by Solid-State Reaction

Ce (2-x–y) Gd x Dy y O 2-δ nanoparticles with x  = 0.02 and y  = 0.02, 0.04, 0.06, and 0.08 with a size range of 15.81 to 40.42 nm have been obtained by annealing the solid-state reaction-derived nanocrystalline powders. Correlations between Gd and Dy doping and lattice expansion were found; lattice...

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Bibliographic Details
Published in:Brazilian journal of physics 2024-12, Vol.54 (6), Article 217
Main Authors: Subbaiah, G. Chinna Venkata, Rao, Nasina Madhusudhana, Chakravarthi, Maddikera Kalyan
Format: Article
Language:English
Subjects:
Cerium oxides
Coercivity
Doping
Dysprosium
Gadolinium
Lattice parameters
Magnetic measurement
Magnetic moments
Magnetic properties
Nanoparticles
Optical properties
Parameter identification
Photoluminescence
Physics
Physics and Astronomy
Solid state
Transition metals
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Summary:Ce (2-x–y) Gd x Dy y O 2-δ nanoparticles with x  = 0.02 and y  = 0.02, 0.04, 0.06, and 0.08 with a size range of 15.81 to 40.42 nm have been obtained by annealing the solid-state reaction-derived nanocrystalline powders. Correlations between Gd and Dy doping and lattice expansion were found; lattice parameters increased from 5.423 to 5.468 Å. When Gd and Dy content increased, optical investigations showed unexpected bandgap behaviour that did not follow the predicted reduction. Red, green, blue, and violet emissions have been identified via photoluminescence analysis. SEM and EDS verified the homogenous elemental distribution of spherical nanoparticles. With a growing magnetic moment and coercive field, magnetic measurements showed paramagnetic activity.
ISSN:0103-9733
1678-4448
DOI:10.1007/s13538-024-01602-y