a system and a method are described herein for demagnetizing a region of a magnetic structure . in one embodiment , the system comprises : a pulsed magnetizer ; and at least one magnetizing coil that receives a sequence of discrete current with continually decreasing current values from the pulsed magnetizer and outputs a sequence of discrete magnetizing fields with continually decreasing field strengths to overwrite and at least partly demagnetize the region of the magnetic structure . the at least one magnetizing coil is located adjacent to the region of the magnetic structure .