Ferromagnetic substances can be magnetized to saturation as long as they are under the action of a small magnetic field. Not only the magnetic susceptibility is >0, ach freisin tá an luach chomh mór le 10-106 orduithe méide. Is feidhm chasta neamhlíneach é an gaol idir an maighnéadú M agus an réimse maighnéadach H. caidreamh.
