Structural and Magnetic Properties of Colossal Magnetoresistance LSMO Nanoparticles Synthesized by Sol–Gel

Paper ID : 1028-ISCH

Authors

Mahmoud Ali Salim * Assistant Lecturer

Abstract

In this work, La₀.₆₇Sr₀.₃₃MnO₃ (LSMO) colossal magnetoresistance (CMR) nanoparticles were synthesized through a non-aqueous sol–gel route, and the effect of annealing temperature on their structural and magnetic properties was systematically investigated. The samples were calcined at different temperatures (600 °C, 750 °C, 900 °C, and 1050 °C) to control particle size and crystallinity. X-ray diffraction (XRD) confirmed the formation of single-phase LSMO nanoparticles with a rhombohedral perovskite structure (R-3c space group). The average crystallite size was found to be approximately 30 nm and strongly dependent on the annealing temperature. Magnetoresistance measurements revealed a pronounced CMR effect of nearly 80%, consistent with values reported for pure CMR phases. The results demonstrate that precise control of particle size at the nanoscale plays a critical role in optimizing both structural stability and magneto-transport performance. This work highlights the potential of nanoscale LSMO as a promising candidate for advanced functional applications, particularly in the design and fabrication of perovskite-based solar cells, where magneto-electronic coupling can enhance device efficiency.

Keywords

• LSMO nanoparticles • Colossal Magnetoresistance (CMR) • Sol–gel synthesis • Structural properties • Magnetic properties • X-ray diffraction (XRD) • Annealing temperature • Perovskite manganites

Status: Abstract Accepted (Oral Presentation)