[en] The torque T and the rotational hysteresis (rh) of permanent magnets with the composition Sm(Co/sub 0.65/Fe/sub 0.27/Cu/sub 0.06/Zr/sub 0.02/)/sub 7.44/ have been investigated at room temperature. T and rh depend sensitivity on the magnetization state of the magnet. A dependence of the rh work on the coercivity and the magnetic state of the material could be shown. Results give evidence that in the annealed samples the domain walls are easily movable where after the thermal treatment the hard magnetic characteristics of the sample are nearly recovered