Magnetic properties of Co2C and Co3C nanoparticles and their assemblies

Journal Article · Mon Jul 02 04:00:00 UTC 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4733321· OSTI ID:1211310

Carroll, KJ; Huba, ZJ; Spurgeon, SR; Qian, MC; Khanna, SN; Hudgins, DM; Taheri, ML; Carpenter, EE

Nano-composite material consisting of Co2C and Co3C nanoparticles has recently been shown to exhibit unusually large coercivities and energy products. Experimental studies that can delineate the properties of individual phases have been undertaken and provide information on how the coercivities and the energy product change with the size and composition of the nanoparticles. The studies indicate that while both phases are magnetic, the Co3C has higher magnetization and coercivity compared to Co2C. Through first principles electronic structure studies using a GGA+U functional, we provide insight on the role of C intercalation on enhancing the magnetic anisotropy of the individual phases. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733321]

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• OSTI ID: 1211310
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 101; ISSN 0003-6951
• Country of Publication: United States
• Language: English