what do you mean by radial magnetic field???why,in case of paramagnetism,dipoles get temporarily aligned whereas permanently in ferromagnetism???
Radial magnetic field usually means a magnetic field in a direction that is away (or towards) your center of axis. A ferromagnetic compound will divide itself to domain each of which has a total magnetic moment in some random direction. An external field increases the size of domains pointing to that direction, and thus you get 'permanent alignment'. A paramagnetic material does not have domains - each moment of the atoms points in a random direction, and the external field will only have a linear response as long as it is there. When it's turned off, all domains go back to pointing randomly.
