CMI researchers from Ames National Laboratory conducted the activity for this highlight
Innovation
Microstructural design enhances coercivity of magnetic nanoparticle assemblies via inter-particle magnetostatic interactions.
Achievement
- Our model reveals that inter-particle magnetic interactions can increase coercivity in REE-free magnetic materials with moderate magnetic anisotropy like Fe16N2.
- We find that axial magnetostatic interactions enhance the coercivity, while lateral interactions reduce it in bulk magnets assembled from magnetic nanoparticles.
- Rational design of the spatial packing pattern of magnetic particles can therefore enhance bulk magnet performance.
Significance and Impact
Developing magnets without critical REEs will reduce dependence on Nd, Pr, Dy, Tb, and strengthen supply chain robustness.
Hub Target Addressed
Accelerated magnet discovery and maturation.