Issue |
EPL
Volume 146, Number 6, June 2024
|
|
---|---|---|
Article Number | 66003 | |
Number of page(s) | 6 | |
Section | Condensed matter and materials physics | |
DOI | https://doi.org/10.1209/0295-5075/ad5908 | |
Published online | 11 July 2024 |
Correlation between the structural phase transition and magnetic properties of sol-gel synthesized nanoparticles
1 Department of Physics and Astrophysics, University of Delhi - Delhi 110007, India
2 Materials Science Research Lab (Theory and Experimental) Department of Physics, ARSD College, University of Delhi - New Delhi, 110021, India
3 Department of Physics, Hindu College, University of Delhi - New Delhi-110007, India
4 School of Physical Sciences, Jawaharlal Nehru University - New Delhi-110067, India
Received: 2 April 2024
Accepted: 17 June 2024
The La2CoFeO6 (LCFO) nanoparticles were synthesized using the sol-gel method and calcined at 600 , 800 , and 1000 . The X-ray diffraction data confirm the successful formation of LCFO nanoparticles. The crystallite size was observed to increase from ∼13 nm to ∼26 nm as the calcination temperature rose. Detailed Rietveld analysis revealed the coexistence of both orthorhombic (Pnma: S.G. 62) and rhombohedral (: S.G. 167) phases in the LCFO samples. A two-phase Rietveld refinement demonstrated a structural phase transition (from Pnma to ) as the calcination temperature increased. FESEM micrographs exhibited a granular morphology for the LCFO nanoparticles, and the grain size was observed to increase with the elevated calcination temperature. Magnetization curves illustrated an increase in magnetization with a decrease in crystallite size or a reduction in calcination temperature for LCFO nanoparticles. At higher calcination temperatures, the rhombohedral phase displayed significant antisite disorder, resulting in the disruption of long-range ferromagnetic ordering in the material and a subsequent decrease in maximum magnetization.
© 2024 EPLA
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