Author(s)

A. M. Samy^*, E. Hassan Aly

Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt.

Lithium ferrite nanoparticles were synthesized by a sol-gel auto-combustion method. For prepared samples, the nanograins were increased with increasing the annealing temperature. Positron annihilation lifetime spectroscopy (PALS) was used to study defects at different sites for nanograins Li-ferrites. The analysis of the PAL spectrum indicated two lifetime components τ₁ and τ₂ for the annihilation of the positrons, and their corresponding relative intensities I₁% and I₂%. For nanoparticles Li-ferrite there are correlations between: 1) I₂, τ₂, annealing temperature and the total porosity (Pt) with the grain size; 2) I₁, μ_i, M_s and the homogeneity with grain size.

Nano Li-Ferrite, Porosity, Positron Annihilation, Initial Permeability, Magnetization

Samy, A. and Aly, E. (2015) Effect of Annealing Temperature on Prepared Nanoparticles Li-Ferrite Using Positron Annihilation Lifetime Technique. Materials Sciences and Applications, 6, 436-444. doi: 10.4236/msa.2015.65047.