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Venkataraju, C., Paulsingh, R. (2015). EPR studies of Cd substituted Mn Zn nanoferrites. International Journal of Nano Dimension, 6(3), 255-261. doi: 10.7508/ijnd.2015.03.004
C. Venkataraju; R. Paulsingh. "EPR studies of Cd substituted Mn Zn nanoferrites". International Journal of Nano Dimension, 6, 3, 2015, 255-261. doi: 10.7508/ijnd.2015.03.004
Venkataraju, C., Paulsingh, R. (2015). 'EPR studies of Cd substituted Mn Zn nanoferrites', International Journal of Nano Dimension, 6(3), pp. 255-261. doi: 10.7508/ijnd.2015.03.004
Venkataraju, C., Paulsingh, R. EPR studies of Cd substituted Mn Zn nanoferrites. International Journal of Nano Dimension, 2015; 6(3): 255-261. doi: 10.7508/ijnd.2015.03.004

EPR studies of Cd substituted Mn Zn nanoferrites

Article 5, Volume 6, Issue 3, Summer 2015, Page 255-261  XML PDF (647.68 K)
Document Type: Reasearch Paper
DOI: 10.7508/ijnd.2015.03.004
Authors
C. Venkataraju email ; R. Paulsingh
Department of Physics, Karpaga Vinayaga College of Engineering and Technology, Near Madhuranthagam, 603 308, India.
Abstract
Nanoparticles of Mn0.5Zn0.5-xCdxFe2O4 with x varying from x = 0.0 to 0.3 were prepared by wet chemical co-precipitation method. The structural and magnetic properties were studied by using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM) and Electron Paramagnetic Resonance (EPR) technique. The lattice constant increases with increase in Cd content. This increase in the lattice constant is due to larger ionic radii of the Cd2+ (0.97 Å) ions as compared to Fe3+ (0.64 Å) ions. The intensities of the planes (220) and (440), increases with increasing Cd2+ ion concentration. This shows that Cd2+ ions occupy tetrahedral A sites and octahedral B sites in the nano dimension against their chemical preference for A site. The line width (ΔHpp) and the g value of the Electron paramagnetic resonance (EPR) signal decreases with increase in the Cd content. The magnetic moment of all the samples up to x = 0.2 calculated from EPR studies are lower when compared to the theoretical values. This lower value of magnetic moment confirms the existence of non collinear magnetic structure arising due to significant amount of spin disorder existing at B site.
Keywords
Nanostructured materials; Chemical synthesis; Electron paramagnetic resonance (EPR); Magnetic property; Scanning Electron Microscope (SEM)
Main Subjects
Nanophysic
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