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Exploring the Impact of CeO2 Doping on the Structure and Magnetism of Hematite Nanoparticles


Affiliations
1 Department of Physics, Research Scholar, Baba Mastnath University, Rohtak 124 021, India
2 Department of Physics, Faculty of Sciences, Baba Mastnath University, Rohtak 124 021, India
3 Department of Physics, Faculty of Sciences, M.N.S Govt. College, Bhiwani 127 021, India
4 Department of Physics, Faculty of Sciences, Pt. N.R.S Govt. College, Rohtak 124 001, India

In this study, Fe2O3 nanoparticles were doped with varying concentrations of cerium oxide (CeO2) (5%, 10%, and 20%) were synthesized by using a microwave treated co-precipitation method and thereafter, calcined at 600o C temperature for 2hrs. The X-ray diffraction (XRD) analysis revealed that all calcined samples exhibited hexagonal crystalline structures, with a decrease in grain size from 60.547nm to 47.060 nm with increasing CeO2 concentration. Fourier transform infrared (FTIR) spectroscopy confirmed characteristic peaks of hydroxyl group at 3541 cm-1 and 1624 cm-1, while sharp peaks of 471 cm-1 were identified as the O-Ce-O stretching vibrational band. The observed FTIR patterns were consistent with the XRD results supporting the influence of differing ionic radii between Ce4+ and Fe3+ ions. The Magnetic properties were examined through by using a vibrating sample magnetometer (VSM) and revealed that saturation magnetization peaked at 5% CeO2 dopant concentration (Ms = 33.2×10-2 emu/g), while coercivity reached its maximum at 10% concentration (Hc = 548.26 Oe). Conversely, remnant magnetization (Mr) decreased (4.3×10-2, 3.1×10-2, and 0.9×10-2 emu/g) with increasing cerium oxide concentration (5%, 10%, and 20%).

Keywords

Ceria-doped Fe2O3 nanoparticles; XRD; FTIR; Structural and Magnetic properties
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  • Exploring the Impact of CeO2 Doping on the Structure and Magnetism of Hematite Nanoparticles

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Authors

Seemaa
Department of Physics, Research Scholar, Baba Mastnath University, Rohtak 124 021, India
Meenakshi
Department of Physics, Faculty of Sciences, Baba Mastnath University, Rohtak 124 021, India
Rajesh Sharma
Department of Physics, Faculty of Sciences, M.N.S Govt. College, Bhiwani 127 021, India
Seema
Department of Physics, Faculty of Sciences, Pt. N.R.S Govt. College, Rohtak 124 001, India

Abstract


In this study, Fe2O3 nanoparticles were doped with varying concentrations of cerium oxide (CeO2) (5%, 10%, and 20%) were synthesized by using a microwave treated co-precipitation method and thereafter, calcined at 600o C temperature for 2hrs. The X-ray diffraction (XRD) analysis revealed that all calcined samples exhibited hexagonal crystalline structures, with a decrease in grain size from 60.547nm to 47.060 nm with increasing CeO2 concentration. Fourier transform infrared (FTIR) spectroscopy confirmed characteristic peaks of hydroxyl group at 3541 cm-1 and 1624 cm-1, while sharp peaks of 471 cm-1 were identified as the O-Ce-O stretching vibrational band. The observed FTIR patterns were consistent with the XRD results supporting the influence of differing ionic radii between Ce4+ and Fe3+ ions. The Magnetic properties were examined through by using a vibrating sample magnetometer (VSM) and revealed that saturation magnetization peaked at 5% CeO2 dopant concentration (Ms = 33.2×10-2 emu/g), while coercivity reached its maximum at 10% concentration (Hc = 548.26 Oe). Conversely, remnant magnetization (Mr) decreased (4.3×10-2, 3.1×10-2, and 0.9×10-2 emu/g) with increasing cerium oxide concentration (5%, 10%, and 20%).

Keywords


Ceria-doped Fe2O3 nanoparticles; XRD; FTIR; Structural and Magnetic properties