Rare-Earth-Free Permanent Magnets for Electrical Vehicle Motors and Wind Turbine Generators: Hexagonal Symmetry Based Materials Systems Mn-Bi and M-type Hexaferrite

Technical Report · Thu Jun 05 00:00:00 EDT 2014

DOI:https://doi.org/10.2172/1133257· OSTI ID:1133257

Hong, Yang-Ki ^[1]; Haskew, Timothy ^[1]; Myryasov, Oleg ^[1]; Jin, Sungho ^[2]; Berkowitz, Ami ^[2]

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1. University of Alabama
2. University of California San Diego

The research we conducted focuses on the rare-earth (RE)-free permanent magnet by modeling, simulating, and synthesizing exchange coupled two-phase (hard/soft) RE-free core-shell nano-structured magnet. The RE-free magnets are made of magnetically hard core materials (high anisotropy materials including Mn-Bi-X and M-type hexaferrite) coated by soft shell materials (high magnetization materials including Fe-Co or Co). Therefore, our research helps understand the exchange coupling conditions of the core/shell magnets, interface exchange behavior between core and shell materials, formation mechanism of core/shell structures, stability conditions of core and shell materials, etc.

• Research Organization: Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of California, San Diego, CA (United States); Mississippi State Univ., Mississippi State, MS (United States)
• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: AR0000189
• OSTI ID: 1133257
• Report Number(s): DOE-ALABAMA-0000189
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
25 ENERGY STORAGE
Exchange coupling
core-shell
rare-earth-free
permanent magnet
Mn-Bi
M-type hexaferrite