Origin of large magnetic anisotropy in 4f-electron-free “1-5” materials 

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chemical diagram shows physical structure of  YCo5
Physical structure of  YCo5

CMI researchers at Oak Ridge National Laboratory conducted the research for this highlight

Innovation 
The large magnetic anisotropy in 4f-electron free materials such as YCo5 and LaCo5 is found to arise from Fermi-level flat bands originating in the Cobalt Kagome lattice.

Achievement
Identification of structural basis of desired behavior may point way for discovery of Kagome-lattice Iron-based materials with similar character.

Significance and impact
Determining the origin of these magnetic anisotropies exceeding those of Nd2Fe14B may yield a pathway towards new critical rare-earth free magnets.

Hub Target Addressed
Development of new reduced-criticality permanent magnets.

G.D. Samolyuk, K. Belaschenko, and D.S. Parker, in preparation. 

line graph shows calculated band structure of  YCo5; Fermi level indicated – note associated flat bands. 
Calculated band structure of  YCo5; Fermi level indicated – note associated flat bands.