Effect of phase separation in an Fe20Ni80/Fe50Mn50 structure with exchange coupling

The effect of heat treatment and partial oxidation of an Fe₅₀Mn₅₀ layer on the structure and magnetic properties of exchange-coupled Fe₂₀Ni₈₀/Fe₅₀Mn₅₀ layers has been investigated. The behavior of the exchange-bias field and coercive force depending on the temperature of annealing upon heat treatment in a vacuum or in an oxygen-containing gas mixture has been studied. It has been shown that, by adjusting the parameters of annealing in the gas mixture, it is possible to increase the field of switching of the exchange-coupled Fe₂₀Ni₈₀/Fe₅₀Mn₅₀ layers.