Currently used high-performance permanent magnet materials are consist of rare-earth elements and transition elements mostly iron and cobalt. The rare-earth supply crisis in 2011 revealed the dependency on the rare-earth elements and other critical materials. As a consequence, optimized use of critical elements arises as a goal for the search of permanent magnet materials.
In the recent years, studies carried out in rare-earth-lean ThMn12-type systems revealed its potential as new hard magnetic materials. In the Functional Materials group, we carry out studies on the ThMn12-type systems using different rare-earth elements. We use different experimental methods for sample production and advanced characterization methods. Recent publications of Functional Materials are not only focusing to the experimental studies but also direct correlation of the experimental findings with theoretical predictions [1-4].
[1] F. Maccari, L. Schafer, I. Radulov et al., Rapid solidification of Nd1+xFe11Ti compounds: Phase formation and magnetic properties, Acta Mater. 180 (2019) 15.
DOI: 10.1016/j.actamat.2019.08.057
[2] H. I. Sözen, S. Ener, F. Maccari, et al., Ab initio phase stabilities of Ce-based hard magnetic materials and comparison with experimental phase diagrams, Phys. Rev. Mater. 3 (2019) 084407
DOI: 10.1103/PhysRevMaterials.3.084407
[3] D. Palanisamy, S. Ener, F. Maccari, et al., Grain boundary segregation, phase formation, and their influence on the coercivity of rapidly solidified SmFe11Ti hard magnetic alloys, Phys. Rev. Mater. (2020) Accepted.
DOI: 10.1103/PhysRevMaterials.4.054404
[4] D. Simon, H. Wuest, S.Hinderberger et al, Structural and magnetic properties of Ce1-xSmxFe11-yTi1Vy, Acta Mater. 172 (2019) 131.
DOI: 10.1016/j.actamat.2019.04.006
