Abstract

The results of the experimental study and computer simulation of the resonance spectra of a single crystal of the iron-manganese sulfide FexMn1−xS (0≤x≤0.29) are presented. The resonance properties of the concentrated solid solutions are explained by the formation of a homogeneous FexMn1−xS matrix with randomly distributed superparamagnetic iron nanoparticles. The mean diameter (⟨D⟩=6.19 nm at T=250 K) and the axial first-order anisotropy constant (К1=4.08 erg/cm3 at T=250 K) of the ferromagnetic particles are determined. The volume fraction of the iron phase is estimated.

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