Synthesis and characterization of copper Doped mixed ferrite co ni co ni ni mn Nanoparticles co ni cu and ni mn cu ferrite Nanoparticles as humidity sensors and Electro catalysts

Abstract

The limited magnetic properties of iron oxide nanoparticles newlinepresent a challenge to the application of these particles in magnetic newlinenanoparticle technology Increasing the saturation magnetization of newlinemagnetic nanoparticles will permit more effective development in the field newlineof nanotechnology Hence the present work mainly focuses on the aspect of newlinesynthesizing novel magnetic nanoparticles newlineAmong spinel ferrites cobalt ferrite CoFe2O4 is especially newlineinteresting because of the high cubic magnetic crystalline anisotropy high newlinecoercivity and moderate saturation magnetization In the case of nickel newlineferrite the inverse spinel type is particularly interesting due to the high newlinemagneto crystalline anisotropy and high saturation magnetization which newlineare attributed to the typical crystal and magnetic structure newlineThe substitution of copper Cu in these ferrites brings about a newlinestructural phase transition accompanied by a reduction in the crystal newlinesymmetry due to cooperative Jahn Teller effect which ultimately results in newlinesome interesting electrical and magnetic properties A novel idea of using newlineCu as an additive element to cobalt ferrite and nickel ferrite is proposed in newlinethis work newline newline