Structure, Magnetic and Magnetoresistive Properties of Composite Materials Based on Ferromagnetic Metals and Alloys with Different Types of Dielectric Matrix

A literary review of the experimental results concerning phase state and crystal structure, magnetoresistive and magnetic properties of the thin-film composite materials formed on the base of granules of ferromagnetic Co metal or FexCo1–x alloy embedded into the insulator matrix (SiO, SiO2, Al2O3) via different discovery methods is presented. As shown, the value of magnetoresistance, character of its field dependences and magnetic characteristics depend on the concentration and size distribution of ferromagnetic granules. At the specified conditions, the perpendicular anisotropy can be realized in the structures as ferromagnetic granule–insulator matrix; the reasons of such anisotropy are analysed.