Abstract

The experimental equatorial Kerr effect spectra for Mn 1− x Fe x alloy films (observed only for x >0.50) can be well simulated in the framework of effective medium approximation. The simulation reveals that the phases in the Mn 1− x Fe x alloy films follow the phase diagram for the bulk Mn–Fe alloys. The optical conductivity spectra for Mn 1− x Fe x alloy films are separated into three groups, whose optical properties are determined by predominance of the α-Fe (0.8< x <0.97), the γ-Mn–Fe (0.2< x <0.6) and the α-Mn (0.02< x <0.23) phases, respectively.

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