The influence of the structural state of terbium on its magnetic prope
rties is studied. It is shown that in the submicrocrystalline state re
magnetization occurs following a wide hysteretic loop and a helical an
tiferromagnetic order does not form. Unlike the coarse-grained state,
the magnetization value in the submicrocrystalline state is 5 times le
ss, and the temperature of magnetic transformation is lower by 14 K. (
C) 1998 Acta Metallurgica Inc.