Complex sentence: The magnet consists of two sections, one of "hard" high coercivity material and one of "soft" (low coercivity) material; in the latter piece the direction of magnetization can be switched by a pulse of current in a wire winding.
Split into simpler sentences: The magnet consists of two sections, one of "hard" high coercivity material and one of "soft" (low coercivity) material. The direction of magnetization in the latter piece can be switched by a pulse of current in a wire winding.