Speaker
Description
FeCo alloys, a class of intermetallic soft magnetic materials, have attracted considerable interest due to their exceptional magnetic performance, including high saturation magnetisation (~2.4 T) and elevated Curie temperatures (920–985 °C). Despite these advantages, their practical application is limited by the high cost of Co and poor ductility, particularly at low temperatures. Alloying with elements such as Pt has been explored to improve structural stability and mechanical performance; however, achieving a balance between enhanced mechanical properties and high magnetic performance remains challenging. While ternary systems have shown improved ductility, they often compromise magnetic properties, motivating the transition toward more complex quaternary compositions. In this study, quaternary Fe50Co43.75-xPt6.25Tax alloys were examined using density functional theory (DFT) within the GGA-PBE framework. The substitution of Ta at Co sites was found to improve the thermodynamic and vibrational stability as well as ductility of Fe50Co47.75Pt6.25 alloy. These findings offer valuable insights for the design of FeCoPt-based alloys with an optimal balance of mechanical and magnetic properties for advanced soft magnetic applications
| Apply for student award at which level: | MSc |
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