Nanocrystalline Sm0.5Y0.5Co5 Alloys with Enhanced Magnetic Properties
Nanocrystalline Sm0.5Y0.5Co5 powders (average crystal size d = 12 nm) were produced by arc melting pure metals followed by mechanical milling and annealing. Different milling/annealing times and annealing temperatures were used to optimize the hard magnetic properties of these nanopowders. A noticeably enhanced coercivity and remanence (coercivity of 2.1 MA/m, and σr/σmax = 0.7 respectively) were observed in samples milled for 240 minutes and then annealed for 1 minute at Temperatures ~1200K. Such remarkable magnetic properties stem from the high magnetocrystalline anisotropy field and the homogeneous grain size of the Sm0.5Y0.5Co5 nanocrystals.
S. Velumani and René Asomoza
J. L. Hidalgo-González et al., "Nanocrystalline Sm0.5Y0.5Co5 Alloys with Enhanced Magnetic Properties", Advanced Materials Research, Vol. 68, pp. 84-88, 2009