Effect of annealing atmospheres on cobalt ferrite nono-particles and their applications

V. Kumar¹ - R. P. Pant¹ - V. K. Jain¹ - M. S. Yadav²

¹ National Physical laboratory, Dr. K.S. Krishnan Road, New Delhi, India
² Department of Physics, Kurukshetra University, Kurukshetra, India

Abstract
Cobalt ferrite nano-particles have been synthesized by co-precipitation and annealed in air and in an inert atmosphere. Change in the physical properties has been analyzed by various analytical techniques like XRD, TEM, VSM, etc. A significant change in the physical properties like structural, particle shape, size, magnetization and microwave absorption has been observed. The effect of annealing on other properties like Curie temperature, electrical conductivity is also investigated. Particles unannealed and annealed in air and in an inert atmosphere are studied for electromagnetic wave interference. Tables 3, Figs 3, Refs 18.