Study of the rate of degradation of permalloy nanowires

Abstract

The work is devoted to the study of the degradation mechanisms of permalloy nanowires. As a method for producing nanostructures, the method of electrochemical synthesis was used using polymer films with diameters of 400 nm and a pore density of 1 × 107 pores/cm2 as templates. The study found that after 1 day in a 3% NaCl solution, the formation of an oxide film is observed, as well as the appearance of point ulcerative inclusions. The second stage of corrosion consists in the formation of a porous shell of a mixture of oxides and hydroxides of the type NiFe2O4/FeO(OH), the appearance of which is due to the processes of introduction of oxygen ions and the subsequent formation of stable impurity compounds. The final stage of degradation of nanostructures is associated with a sharp increase in impurity inclusions and partial destruction of nanostructures. It is established that the degradation mechanism is nonlinear in nature, and a sharp increase in the degradation rate is associated with amorphization and disordering of the crystal structure.