The State Complex Programme of Scientific Research "Crystal and molecular structures" (approved by the Presidium of NAS of Belarus № 21 from 24.02.06), the task 1.16 "Development of physical and chemical principles to create a magnetic field sensor based on a comprehensive analysis of the electrical conductivity, magnetoresistance and magnetic properties of granular composite materials", (№ state. Reg. 20,064,655; from 8.9.2006).