Sm_2(Fe_<0.8>Co_<0.2>)N_<3.03>圧縮成形ボンド磁石の磁気余効

概要

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The magnetic field and temperature dependences of the magnetic aftereffect constant Sv were examined for the Sm2(Fe0.8Co0.2)17 N3.03 compression bonded magnet at a temperature range from 77 to 397K. Sv increases gradually with increasing the magnetic field. The temperature dependence of coercive force HCJ, for Sm2(Fe0.8Co0.2)17N3.03, Sm-Co and Nd-Fe-B magnets decrease with the increasing temperature. However, the temperature dependence of Sv for the Sm2(Fe0.8Co0.2)17N3.03 compression bonded magnet was reverse to HCJ, in contrast to Sm-Co and Nd-Fe-B magnets. The temperature variation of coercive force ΔHCJ/ΔT in these rare-earth magnets linearly decreases as the activation volume v increases. Larger v for low ΔHCJ/ΔA T values and smaller v for higher HCJ, values are necessary, so that balanced performance of HCJ, should be obtained by choosing appropriate v values.
社団法人粉体粉末冶金協会の論文
1995-01-15