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Vol. 37 No. 2 (2025): Vol 37 Issue 2, 2025

Copyright (c) 2025 Kurva Rammohan

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Synthesis, Characterization and Magnetic Properties of SmFexO3 and LaFexO3 Perovskites with Iron Excess and Deficiency (x = 1.05, 0.95)

https://doi.org/10.14233/ajchem.2025.33322
K. Rammohan
Department of Chemistry, University College of Science, Osmania University, Hyderabad-500007, India; Department of M.Sc. 5 Year Integrated Chemistry, University P.G. College, Palamuru University, Mahbubnagar-509001, India
https://orcid.org/0000-0001-8994-905X
G. Vijaya Lakshmi
Department of Chemistry, University College of Science, Osmania University, Hyderabad-500007, India; Department of Chemistry, Veeranari Chakali Ilamma Women’s University, Koti, Hyderabad-500095, India
https://orcid.org/0000-0001-7183-4908
G. Ramesh
Department of Chemistry, Vardhaman College of Engineering, Hyderabad-501218, India
https://orcid.org/0000-0002-5630-4383

Corresponding Author(s) : G. Vijaya Lakshmi

gvjlakshmi@gmail.com

Asian Journal of Chemistry, Vol. 37 No. 2 (2025): Vol 37 Issue 2, 2025

Abstract

SmFeO3 (SFO) and LaFeO3 (LFO) perovskites with excess and deficient iron (SmFe1.05O3, SmFe0.95O3 and LaFe1.05O3, LaFe0.95O3) were synthesized using the sol-gel method, achieving a quantitative yield of 98%. The materials were thoroughly characterized using powder X-ray diffraction (p-XRD), field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FESEM-EDS), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM) analysis. The p-XRD confirmed the successful synthesis of the iron-modified SFO and LFO perovskites with an orthorhombic structure, crystallizing in the Pnma space group and the La3+ forms an eight-coordinate geometry with O2– atoms in the perovskite lattice. The orthorhombic structure and phase purity, irregular morphology conformed by p-XRD and FESEM analysis. The elemental composition and the surface architecture and chemical valence state of key elements of above perovskites by EDS and XPS analysis. The band gap energies of SmFe1.05O3 (1.96 eV) SmFe0.95O3 (2.04 eV) and LaFe1.05O3 (2.00 eV) LaFe0.95O3 (2.11 eV) were determined using UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). VSM analysis revealed that iron-deficient LaFexO3 (LaFe0.95O3) exhibited paramagnetic behaviour with higher saturation magnetization, while iron-excess SmFexO3 (SmFe1.05O3) also displayed paramagnetic behaviour.

Keywords

Perovskites Iron excess Iron deficiency VSM analysis Magnetic properties Paramagnetism
Rammohan, K., Lakshmi, G. V., & Ramesh, G. (2025). Synthesis, Characterization and Magnetic Properties of SmFexO3 and LaFexO3 Perovskites with Iron Excess and Deficiency (x = 1.05, 0.95). Asian Journal of Chemistry, 37(2), 503–510. https://doi.org/10.14233/ajchem.2025.33322
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