| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
|
| Presentation Title |
Enhanced Magnetostriction in Galfenol through Dilute Ce-doping |
| Author(s) |
Alexander Baker, Hunter B Henderson, Emily Moore, Mohammad T Islam, Yumi Ijiri, Matthew Willard, Scott McCall, Alfred Amon |
| On-Site Speaker (Planned) |
Alfred Amon |
| Abstract Scope |
Magnetostrictive materials such as FeGa (Galfenol) provide high precision solid-state sensing capabilities, with applications in magnetic field sensing, load cells, or tunable inductor circuits. The magnetostrictive coefficient in Galfenol can be enhanced by doping rare earth elements, with recent reports showing that light rare earths such as Ce or La are particularly effective. Here we demonstrate that these enhancements can be achieved with much lower levels of Ce than previously thought. This investigation is motivated by CALPHAD studies of the Fe-Ga-Ce phase diagram, which identified the solubility limit of Ce in FeGa, and showed that higher Ce levels lead to the formation of a deleterious CeGa2 phase, which can be suppressed by quenching from elevated temperatures. Experimental results confirm that additional Ce does not further enhance performance. A comprehensive study of Ce additions will be presented, identifying the conditions required to achieve optimal properties.
Prepared by LLNL under Contract DE-AC52-07NA2 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Energy Conversion and Storage, |