Square-plated magnetite nanocrystals with a high aspect ratio (~ 1/9) are prepared by the co-precipitation from a solution in the presence of arabinogalactan. The magnetic anisotropy constant of particles is several times higher than the constant of spherical magnetite particles, which leads to increased hysteresis properties for specific volume of the particle.

The CoP-based layered magnetic films, what is more the every layer has certain atomic and chemical structure, were studied by spin-resonance method. The covers were synthesized two type: magnonic crystals (amorphous Co(P)/fcc Co(P))N and gradient Co(P)-based films and they allow us to observe two different modification SWR spectrum. In one case it is SWR spectrum like Hn(n)~n2 when modification is result from created first stop-zone of a magnonic crystal. In the second case the dependence of resonance fields Hn of the spin-wave modes on mode number n has the form Hn(n)~n2/3. The thermal annealing gives rise to the crystallization (the amorphous state transfers to fcc) and cases the transformation of layered films to films of monophase Co-P-based alloys, this process declares itself in changing SWR spectrums form and in the spectrum modification like “exchange kink”