The present paper investigates conductivity σ for a wide temperature range of 2K<T<300K in the nanocomposite (FeCoZr) x (Al 2 O 3 ) 1− x films (1–6μm thicknesses, 0.30<x<1.00) which were sputtered on glass–ceramic substrates from the compound target in vacuum chamber filled with Ar (set 1 films) or Ar+O 2 gas mixture (set 2 films). TEM and HRTEM images revealed that granular films of set 1 containing nanosized crystalline metallic bcc α-FeCo-based nanoparticles embedded in the amorphous Al 2 O 3 matrix. In case of Ar+O atmosphere of deposited α-FeCo-based crystalline “cores” with stabilized sizes were covered with an amorphous FeCo-based oxide “shells”. The σ(T) dependences were found to be in agreement with this phase structure. They show transition of the set 1 films σ(T) curves with x from tunneling (hopping) behavior below the percolation threshold x<x C ≈0.46 to metallic one for x>x C . Moreover, as opposed to such behavior, for the set 2 films hopping mechanism of σ(T) was revealed far beyond x C due to the formation of semiconducting FeCo-based oxide “shells” separating electrically contacting FeCoZr cores.