Ce/Zr/Fe alloys magnetically hardened by Mo, W and Co

CMI researchers from Ames National Laboratory conducted the activity for this highlight

Innovation  
Novel Ce/Fe-based magnets for U.S. national needs.

Achievement

  • Development of the new critical-element-free Fe-rich alloy with strong uniaxial magnetocrystalline anisotropy through concurrent refractory metals doping.
  • Mixed Zr/Mo or Zr/W doping of Ce2Fe17 facilitates its transformation from hexagonal (H-2:17) to tetragonal (%-1:12) structure inducing strong ferromagnetism and uniaxial magnetic anisotropy.

Significance and impact 
Novel critical-element-free permanent magnet materials that consist of 75 wt.% Fe and use domestic earth-abundant, inexpensive, cerium.

Hub Target Addressed 
Accelerated magnet discovery and maturation.

Top: the article describing novel (Ce,Zr)2(Fe,M)17 (M = Mo, W, Co) magnetic alloys. Left: magnetic XRD patterns, showing the uniaxial magnetocrystalline anisotropy, and with Curie temperatures tuned by refractory metals and/or cobalt doping. Right: anisotropic magnetization and anisotropy fields of the selected samples.
Top: the article describing novel (Ce,Zr)2(Fe,M)17 (M = Mo, W, Co) magnetic alloys. Left: magnetic XRD patterns, showing the uniaxial magnetocrystalline anisotropy, and with Curie temperatures tuned by refractory metals and/or cobalt doping. Right: anisotropic magnetization and anisotropy fields of the selected samples.