The effect of particle size on coercivity and crystallinity of SmCo5

Journal Article · Mon Jul 04 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3607958· OSTI ID:1211298

Chen, CH; Knutson, SJ; Shen, Y; Wheeler, RA; Horwath, JC; Barnes, PN

It is observed a turning point in the particle size for which the coercivity H-ci of a Sm-Co alloy reaches a peak. Using a broad size range from 20 nm to 5 mm, the turning point of the flake thickness for SmCo5 nanoflakes is determined in the range of 100-180 nm with H-ci peak at similar to 20 kOe. A lower coercivity at a particle size well below the turning point is likely related to a more detailed nanoscale morphology that controls coercivity. The effect of particle size on crystallinity for high energy milled powder is also discussed with four observations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3607958]

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• OSTI ID: 1211298
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 99; ISSN 0003-6951
• Country of Publication: United States
• Language: English