It was shown that the soft magnetic properties of amorphous Fe0.85N0.15 film could be modified in a controlled manner by irradiation with 120MeV Ag ions. Irradiation caused a relaxation of short-range as well as long-range stresses, resulting in an improvement in the soft magnetic properties. Nuclear resonance reflectivity was used to measure the diffusion length of Fe atoms as a function of irradiation fluence. It was found that the atomic motion associated with irradiation was not expected to modify significantly the interfaces with substrate or other layers.

Swift Heavy Ions for Controlled Modification of Soft Magnetic Properties of Fe0.85N0.15 Thin Film. R.Gupta, A.Gupta, R.Bhatt, R.Rüffer, D.K.Avasthi: Journal of Physics - Condensed Matter, 2010, 22[22], 226001