Abstract
Film composites based on magnetite nanoparticles with a mean diameter of 4 nm in a polyvinyl alcohol matrix were studied by means of Mossbauer spectroscopy in a magnetic field of up to 3.4 kOe. The spectra were analyzed within the three-level relaxation model of the magnetic dynamics of an ensemble of single-domain particles, taking into account the precession and diffusion of the homogeneous magnetization of particles and their size distribution.
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