Achieving optimum loop shapes in quaternary Pr–Co alloys

Branagan, D. J.; Kramer, M. J.; Tang, Yali; McCallum, R. W.
May 2000
Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p6737
Academic Journal
The magnetic properties and microstructures of a quaternary Pr–Co–Ti–C alloy were investigated. After heat treating at 800 °C, the quaternary alloy developed high coercivity (16.7 kOe) and high energy product (8.6 MGOe). Hysteretic loop shapes exhibiting single-phase magnetic character were achieved which was a problem which previously plagued development of Pr–Co alloys. The optimum microstructure contained 75–100 nm Pr[sub 1]Co[sub 5] hard magnetic grains, 75–100 nm Pr[sub 1]Co[sub 2] second phases, and <10 nm TiC grain boundary precipitates. The important factors in achieving optimum loop shapes in Pr–Co alloys were examined in detail. © 2000 American Institute of Physics.


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