M. Venkatesan, F.M.F. Rhen, R. Gunning and J.M.D. Coey 'Effects of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1:7 magnets' in IEEE Transactions on Magnetics, 38, (5), 2002, pp 2919 - 2921
IEEE Transactions on Magnetics 38 5
The effect of Fe, Cu, Zr, and Ti substitution on
magnetic properties of SmCo 1 : 7 magnets at temperatures up to
500 C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti���Zr)7
magnets crystallized in the TbCu7-type structure after annealing
at 750 C for 2 h. A room-temperature intrinsic coercivity of
around 2.5 T is obtained for compositions SmCo6 4Zr0 2Ti0 4 and
SmCo6 4Fe0 1Zr0 1Ti0 4. The high coercivity of the ball-milled
SmCo7 Ti magnets is attributed to the strong pinning of
the walls of the ���interaction domains�� by the network of grain
boundaries between the nanocrystalline grains. The virgin curve
of the ball-milled samples is suggestive of strong domain wall
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