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A series of MgxZn1-xAl0.4Fe1.6O4 (0 ≤ x ≤ 1.0) substituted mixed ferrites with fine particles (5.0 ≤ D ≤ 11.0 nm) were synthesized by glycol thermal technique. XRD data confirmed formation of single-phase cubic spinel structure with no impurity phases. XRD results were complemented by TEM analysis which showed nearly spherical images with narrow size particle distribution. Substitution of Zn by Mg atoms in ZnAl0.4Fe1.6O4 compound have significant effects electron spin resonance (ESR) properties. ESR spectra showed single line signals broadening (362 ≤ HPP ≤ 860 Oe) with increasing Mg2+ ion concentration due to transformation from dipole-dipole interactions between the particles to superexchange interactions. An increase in g values from about 1.99 to 2.16 occurs due to reducing resonance magnetic field with increasing Mg2+ ions. Hysteresis between signals recorded on cycling magnetic fields observed have been discussed based on the constituent ions and particle size.
| Apply for student award at which level: | MSc |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |