Influence of Ti content on the Structural and Magnetic Properties of Li1-x Ti xLay Fe2-y O4 Ferrite; 0.1≤x≤0.9 and y=0.1 | ||||
| Egyptian Journal of Solids | ||||
| Article 10, Volume 32, Issue 2, 2009, Page 231-243 PDF (367.37 K) | ||||
| DOI: 10.21608/ejs.2009.148851 | ||||
 View on SCiNiTO | ||||
| Abstract | ||||
| The variation of the transition phenomena in the spinel structure; of Li1-x Tix Lay Fe2-y O4 ferrite from the ferrimagnetic to paramagnetic state was observed by substituting Ti for Li in compound. XRD analysis was carried out in order to find a correlation between the average lattice parameter, crystal size on Ti content. Drastic change was observed between x=0.5 and x=0.7 in the magnetic measurements which agrees well with the percolation theory. The magnetization as calculated from susceptibility measurements as a function of temperature and magnetic fields was interpreted in view of Ti contents. The measurements showed that the magnetization increases with increasing magnetic field which is a normal trend of ferrites in the ferrimagnetic region. The susceptibility decreases as the temperature increases due to the increase of the lattice vibration as well as the spin disorder. In addition, the existence of small quantity of La ions influences the magnetic properties of such materials. The hysteresis loops of the investigated samples showed that by increasing Ti and decreasing Li contents the magnetic parameters Ms and Mr decrease as Hc increases. The calculated effective magnetic moment μeff also varied with Ti content, taking into consideration the screening effect of both Ti, Li and La3+ ion. | ||||
|
Statistics Article View: 61 PDF Download: 123 |
||||
