Paper Details

The Mn2O3 and Co3O4 nanoparticles were synthesized by rapid microwave assisted method and assynthesized samples were further annealed at 550 οC and the samples were subjected to analyze structural, optical andmagnetic properties. Structural properties of the nano particles were characterized by using X-ray diffractometry. XRDpattern revealed that the existence of Mn2O3 with body centered cubic structure and Co3O4 with face centered cubicstructure. The FTIR spectra confirmed the presence of Mn-O stretching vibration mode at 523 and 575 cm-1andabsorption bands appeared at 567 and 647 cm-1 were attributed to Co-O stretching and O-Co-O bridging vibrationmodes. The Raman bands of Mn2O3 were assigned at 368, 483 and 652 cm-1 which attributed to the out-of-plane bendingmodes of Mn2O3, asymmetric stretching of bridge oxygen species of Mn-O-Mn and symmetric stretching of Mn2O3 groupsrespectively. Further, major Raman bands of Co3O4 appeared at 670 cm-1is attributed to characteristic of the octahedralsite and other three modes are likely related to the combined vibration of tetrahedral site and octahedral oxygen motionsof Co3O4. The PL spectra exhibited strong blue emission band at 489 and 488 nm and weak defect-related greenemission band at 512 and 505 nm for Mn2O3 and Co3O4. The magnetic properties were studied by vibrating samplemagnetometer (VSM) in both samples at an ambient temperature and the M (H) curves of Co3O4 exhibit ferromagneticnature and Mn2O3 shows antiferromagnetic behavior. From these results, both materials are more suitable for magneticapplications.

M. Karuppaiah, R. Murugan, P. Sakthivel, S. Asaithambi, R.Yuvakkumar, “Rapid microwave assisted synthesis of Mn2O3 and Co3O4 nanoparticles and their structural, optical and magnetic properties”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 19, pp. -, January 2018.