Rare-earth based magnets and Ba/Sr-based ferrite magnets are found to have useful in many areas of physics research. Improvement of magnetic properties of these types of magnets is necessary. Rare-earth -TM based intermetallic magnets have low Curie temperature (Tc) and low magnetic anisotropy where as Sr/Ba ferrites magnets have low magnetization. Many efforts have been made to improve properties of these permanent magnets. Making intermetallic (R2Fe17) with doping of magnetic or non-magnetic element for Fe or inserting interstitials atoms for Fe can change lattice site and significantly increase in curie temperature. In this presentation, I will talk about various methods used in my research to improve the curie temperature, coercivity and magnetization of rare-earth based permanent magnets and Sr-ferrites (ceramics) magnets to use them for high temperature applications.
Jiba Nath Dahal is an assistant professor of physics in the Department of Physics at Truman State University. Dr. Dahal did his Ph.D. from University of California Merced and master’s in Physics and Material Science from the University of Memphis Tennessee. He also did his M.Sc. in condense mater physics from Tribhuvan University, Nepal. His current research is in permanent magnets, magnetic nanoparticles and magnetic nanocomposite, supercapacitor, electrical resistivity of M-type Ferrite, low temperature plasma physics and developing device level model for field assisted microplasmas.