Directional Magnetic Modification of Iron Rhodium Compound by Ion Irradiation and Annealing

Abstract

Depth-directional magnetic modification of FeRh samples by energetic ion beam irradiation and post-annealing and its quantitative analysis are discussed. Iron-rhodium foil samples were irradiated with a 2-MeV He ion beam at various ion fluences. Post-thermal annealing at 373 K–673 K was performed for the irradiated samples. The depth-directional magnetic profiles were quantitatively estimated through the TRIM ion transport simulation, as well as previously known relations between irradiation-induced ferromagnetic moment and elastic deposition energy by ion beam irradiation. The magnetic profiles were considered to be successfully estimated because the values of the total magnetic moment measured are very consistent with the results calculated by TRIM. The effect of thermal annealing and possibility of three-dimensional magnetic modification will be also discussed.