%0 Journal Article %T FTIR and EPR Studies of Nickel Substituted Nanostructured Mn Zn Ferrite %A C. Venkataraju %A R. Paulsingh %J Journal of Nanoscience %D 2014 %R 10.1155/2014/815385 %X The spinel ferrite system is prepared by coprecipitation method. XRD analysis confirms the formation of ferrite phase in all the samples. The FTIR spectra of all the samples show two main absorption bands below 1000£¿cm£¿1. FTIR studies reveal cationic exchange between A site and B site. The magnetic moment calculated from EPR studies is lower when compared to the theoretical values. This confirms the existence of noncollinear magnetic structure arising due to spin canting at B site. 1. Introduction Manganese zinc ferrite is technologically important class of materials because of its unusual magnetic properties and is extensively used in electronic applications such as transformers, coils, and recording heads. Ferrites crystallize into spinal type which has tetrahedral A site and octahedral B site. The properties of the ferrites can be tuned by varying the cation and their distribution among tetrahedral A site and octahedral B site. Further bulk properties of ferrite change as its dimensions are changed to nanoscale [1¨C4]. Superparamagnetism, spin canting, and metastable cation distribution are some of the phenomena which have been observed in nanoparticles of various ferrites. The method of preparation plays an important role in the properties of the ferrite nanoparticles. Varieties of experimental methods like sol-gel method, coprecipitation method, hydrothermal method, reverse micelle method, and autocombustion method are carried out for the production of ferrite nanoparticles. Among these methods coprecipitation method is an attractive method for producing nanoferrites because of increased homogeneity, purity, and reactivity. Singh et al. [5] have reported the EPR studies of nanostructured zinc ferrites heat treated at different temperature. Priyadharsini et al. [6] have reported the FTIR studies of nanostructured NiZn ferrite. In the present investigation we report the FTIR, EPR studies of the Ni substituted MnZn ferrite nanoparticles prepared by coprecipitation method. 2. Experimental Details Nanoparticles of with varying from 0.0 to 0.3 were prepared by coprecipitation method. Aqueous solutions of MnCl2, ZnSo4, NiCl2, and FeCl3 in their respective stoichiometry were thoroughly mixed at 80¡ãC. This mixture was then transferred immediately into a boiling solution of NaOH at 100¡ãC. Precipitation takes place and the solution was stirred for about 60 minutes until the reaction is complete. The pH of the solution was maintained at 12 throughout the reaction. Conversion of metal salts into hydroxides and subsequent transformation of metal hydroxide to %U http://www.hindawi.com/journals/jns/2014/815385/