The effect of neutron irradiation on Sm/sub 2/Co/sub 17/-based high temperature magnets and Nd-Fe-B magnets

This paper reports the effect of neutron radiation on the Sm/sub 2/Co/sub 17/-based magnets with T/sub M/ = 300 /spl deg/C and 500 /spl deg/C (T/sub M/ is the maximum operating temperature at which the extrinsic demagnetization curve is linear). All the samples had intrinsic coercivity (H/sub ei/) > 21 kOe and the ratio of L/D = 1.25. Neutron fluence is in the range of 10/sup 13/ to 10/sup 18/ neu/cm/sup 2/. The results shows that Sm-Co samples maintain 100% of their magnetic strength for all the fluences. Nd/sub 13/Dy/sub 2/Fe/sub 77/B/sub 8/ samples are also studied for comparison.