Synthesis and characterization of rare-earth-free magnetic manganese bismuth nanocrystals

Journal Article · Thu Jan 01 00:00:00 EST 2015 · RSC Advances

DOI:https://doi.org/10.1039/c4ra12440e· OSTI ID:1211280

Shen, J; Cui, HZ; Huang, XP; Gong, MG; Qin, W; Kirkeminde, A; Cui, J; Ren, SQ

Earth abundant manganese bismuth (MnBi) has long been of interest due to its largemagnetocrystalline anisotropy and high energy density for advanced permanent magnet applications. However, solution synthesis of MnBi phase is challenging due to the reduction potential mismatch between Mn and Bi elements. In this study, we show a versatile MnBi synthesis method involving the metal co-reduction followed by thermal annealing. The magnetically hard MnBi crystalline phase is then exchange coupled with magnetically soft cobalt coating. Our processing approach offers a promising strategy for manufacturing rare-earth-free magnetic nanocrystals.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: 11/CJ000/09/03
• OSTI ID: 1211280
• Journal Information: RSC Advances, Vol. 5, Issue 8; ISSN 2046-2069
• Country of Publication: United States
• Language: English