The role of praseodymium substituted ions on electrical and magnetic properties of Mg spinel ferrites

• Published in: Journal of magnetism and magnetic materials 2017-04, Vol.428, p.136-143
• Main Authors: Farid, Muhammad Tahir, Ahmad, Ishtiaq, Kanwal, Muddassara, Murtaza, Ghulam, Ali, Irshad, Khan, Sajjad Ahmad
• Format: Article
• Language: English
• Subjects: Chemical synthesis; Coercivity; Drift mobility; Electrical measurement; Electrical resistivity; Ferrites; Jump length; Magnetic properties; Magnetic saturation; Praseodymium; Remanence; SEM; Semiconductors; Sintering (powder metallurgy); Sol-gel processes; Spinel; Studies; Temperature; X-Ray diffraction; Y-K angles
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2016.12.031

Spinel ferrites with composition MgPryFe2−yO4 (y=0.0, 0.025, 0.05, 0.075, 0.10) were successfully synthesized using sol-gel auto-combustion technique. The structural prisoperties of a prepared sintered powder were characterized with the help of X-ray Diffraction (XRD) and then also by using Scanning electron microscopy (SEM). Electrical measurements demonstrate that resistivity and activation energy increases with the Praseodymium substitution while dc resistivity decreases with the rise of temperature showing the semiconductor nature of the synthesized ferrites. Remanence and the saturation magnetization (Ms) decrease while coercivity (Hc) also increases with the increase in praseodymium contents. Anisotropic constant is observed to exhibit similar behavior as HC. The above mentioned parameters suggest that the synthesized samples are favorable for microwave absorbing purposes. •Magnesium based spinel ferrites were successfully synthesized by sol-gel method.•The spinel phase has been observed in all samples.•The dc resistivity are found to increase with increasing Pr content•The samples with high resistivity have high values of activation energy.•The Ms Decreases with increasing Pr contents while Hc increases.