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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.36: Poster

Thursday, March 21, 2024, 15:00–18:00, Poster C

Insights into the electronic structure of Ce-substituted permanent magnets — •Benedikt Eggert¹, Alex Aubert², Fabrice Wilhelm³, Andrei Rogalev³, Konstantin Skokov², Heiko Wende¹, Oliver Gutfleisch², and Katharina Ollefs¹ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen — ²Functional Materials, Technical University of Darmstadt — ³European Synchrotron Radiation Facility

Permanent magnets significantly contribute to renewable energy technologies based on their broad range of potential applications [1]. The relatively low abundance of rare-earth elements such as Nd and Sm motivates additional research into cost-effective hard magnetic materials by replacing Nd or Sm with more abundant rare-earth materials, such as Ce, Pr or La. With this contribution, we investigate the magnetic properties of Ce-substituted Nd-Fe-B [2] or Ce-Co permanent magnets utilizing X-ray absorption spectroscopy and X-ray magnetic circular dichroism. We will correlate how the system’s magnetic properties depend on Ce’s valence state.

We acknowledge the financial support through the Deutsche Forschungsgemeinschaft within the framework of the CRC/TRR270 HoMMage (Project 405553726-TRR270), the BMBF (05K2019 and 05K2022), and we thank the ESRF for allocation of beamtime at the beamline ID12 within project HC-4051.

[1] O. Gutfleisch et al. Adv. Mater. 23, 821-842 (2011)

[2] Y. Wu et al. Acta Materialia, 235, 118062 (2022)

Keywords: XMCD; Permanent magnets; Multivalence; Ce; pinning type magnets