Novel Existence of canted Spins on Octahedral Sites of CdxMg1-xFe2O4 Ferrites as a Third Active Mode of Vibrations
Abstract: Polycrystalline ferrites CdxMg1-xFe2O4 (x = 0.0, 0.2, 0.4, 0.6 and 1.0) were prepared by standard ceramic technique and characterized by X-ray, SEM, IR absorption and Mssbauer technique. X-ray analysis shows that the samples have single-phase cubic spinal structure. SEM study revealed that all ferrite samples are crack-free having well packed continuous grain structure with well defined grain boundaries. Two distinct absorption bands 1 and 2 in MgFe2O4 arising from intrinsic vibrations on tetrahedral A-site and octahedral B-site is observed. Addition of Cd2+ in the host lattice resembles the shifting of & broadening of 2 up to x =0.4, While for x 0.6 third active mode of vibration 3 in the frequency range 335 cm-1 to 340cm-1, well separated from 2, is clearly observed. Saturation magnetization was determined for obtaining information about the Yaffet-Kittle angles at 300 K. The variation of nB with Cd2+ content suggested the existence of predominating Y-K model for x 0.6, while Neels two Sub-lattice models applicable up to x 0.4. The canting of spins explains the fundamental third active mode of vibrations in Mg-Cd ferrites satisfactorily.
Keywords: Ferrites, IR Spectra, Vibrational mode, Magnetization, Canted spins, Y-K angles
How to Cite?: B. R. Karche, "Novel Existence of canted Spins on Octahedral Sites of CdxMg1-xFe2O4 Ferrites as a Third Active Mode of Vibrations", Volume 3 Issue 11, November 2014, International Journal of Science and Research (IJSR), Pages: 939-942, https://www.ijsr.net/getabstract.php?paperid=OCT141114, DOI: https://dx.doi.org/10.21275/OCT141114