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In Sm_2Fe_17-_x.Mx(M=Al, Ga), there was observed a kind of spin-reorientation with temperature. and in (Sm1_-xTm_x)_2Fe_14Al_3, the anisotropy field HA increases as high as 20% from 5.4 up to 6.5 kOe with T_m.
In (Sm1_-xTm_x) _2Fe_14Al_3, the anisotropy field HA increases as high as 20% from 5.4 up to 6.5 (M = Al, Ga), which was observed in a spin- reorientation with temperature kOe with T_m.