DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.80: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

Structural and magnetic properties of Fe-Ce-W (12:1 and 29:3) intermetallic compounds — •Roman Karimi, Dagmar Goll, Ralf Loeffler, Roland Stein, and Gerhard Schneider — Materials Research Institute (IMFAA), Aalen University, Germany

For low-cost permanent magnet applications Ce-based hard magnetic intermetallic compounds are currently in the focus of research due to the better abundance of Ce in the earth crust compared to Nd or Dy. By bulk high-throughput experimentation based on heterogeneous non-equilibrium states the two hard magnetic compounds Fe11WCe (12:1 phase stronger magnetic) and Fe29−xWxCe3 (29:3 phase, weaker magnetic) have been discovered in the ternary system Fe-Ce-W. As Fe11WCe looks very promising for novel permanent magnets single-phase material has been fabricated by arc-melting. The samples have been analyzed concerning their crystallographic structure and intrinsic magnetic properties using x-ray diffraction, domain pattern analysis and magnetometry. The lattice structure has been identified as ThMn12 structure. For the intrinsic properties saturation polarization Js, anisotropy constant K1 and Curie temperature TC values of Js(RT)∼ 1.1 T, K1(RT) ∼ 2 MJ/m3 and TC ∼ 450 K were found for the 12:1 compound. Values of Js(RT) ∼ 0.5 T and K1(RT)∼ 0.5 MJ/m3 have been estimated for the 29:3 compound. Mechanical alloying is applied to realize nanocrystalline Fe11WCe magnets. Project supported by BMBF (project REleaMag) and Carl-Zeiss-Stiftung.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2016 > Regensburg