The method for tuning the magnetic behavior of soft magnetic nanowires includes forming a pair of defects at axially-opposed ends of the nanowire. The defects change the switching field of the nanowire. As demonstrated by Object-Oriented MicroMagnetic Framework (OOMMF) simulation, the switching field value of the nanowire modified by a pair of defects at the two axially-opposed ends of the nanowire is more than the switching field value of a defect-free nanowire. The defect at each end may be a notch or an anti-notch.