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MA: Fachverband Magnetismus
MA 50: Permanent Magnets
MA 50.1: Vortrag
Donnerstag, 19. März 2020, 15:00–15:15, HSZ 101
High-throughput and data-mining search for rare-earth free permanent magnets — •Alena Vishina1, Olga Yu. Vekilova1, Heike C. Herper1, and Olle Eriksson1,2 — 1Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden — 2School of Science and Technology, Örebro University, Örebro, Sweden
High performance permanent magnets are needed for a large number of applications, such as electric motors, wind mills, and many more. At the same time most high performance magnets contain rare-earth (RE) materials which makes them expensive, while some of the RE elements are rapidly decreasing in availability.
We’ve applied a high-throughput and data-mining approach to the search of rare-earth free permanent magnets. Going through a large number of known structures from ICSD database, and using a full-potential linear muffin-tin orbital method with relativistic formulation as implemented in the RSPt electron structure code to calculate magnetic anisotropy and Curie temperature, we were looking for the materials with high magnetization >1 T, uniaxial anisotropy >1 MJ/m3, and Tc > 300 K to identify the suitable replacement for rare-earth containing materials.
Starting with the materials containing 3d+5d+1 extra element of the periodic table to test the method, we have found several candidates that have characteristics suitable for a good permanent magnet, such as Pt2FeCu, Pt2FeNi, W2FeB2, etc (arXiv:1910.00548 [cond-mat.mtrl-sci]).