THE EFFECT OF GRAIN-SIZE ON MAGNETIC-PROPERTIES IN SM2FE17NX

The microstructures of melt spun Sm11Fe89 and (Sm11Fe89)(94)Ti3C3 have been investigated under different solidification conditions. The magn etic properties of the nitrided materials have been related to the obs erved microstructures. Melt spinning of the Sm11Fe89 alloys resulted i n grain sizes at or above the single domain limit. The addition of Ti and C resulted in an order of magnitude refinement in the microstructu ral scale. The magnetic properties of the samples with grain sizes bel ow the single domain limit decreased with decreasing grain size due to increased intergranular exchange coupling. (C) 1998 American Institut e of Physics.