Speaker
Dr
Rosinah Modiba
(CSIR)
Description
Improvements in energy efficiency and reduction of greenhouse gas emissions have been some of the central topics in recent years in environment and climate change. The advantages of using permanent magnets in many different types of electromagnetic drive and static magnetic field applications are compelling. It seems demand is bound to increase substantially in coming years. There are significant challenges associated with coming up with new alloys or composite materials that can be used for bulk permanent magnets with an energy product in excess of 460 kJ m−3. In this study, first-principles approach employing the density of states within the generalised gradient approximation is employed. The structural, electronic and magnetic properties of Fe16-xN2Co for the development of permanent magnets are investigated. Firstly, geometry optimization was performed to reach the equilibrium state of the structures and the results compared well with the available experimental results. Interestingly the density of states at the Fermi level decreases suggesting the stability of Fe16N2 with Co addition.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
no
Apply to be<br> considered for a student <br> award (Yes / No)?
no
Primary author
Dr
Rosinah Modiba
(CSIR)
Co-author
Prof.
Phuti Ngoepe
(University of Limpopo)
