Hopping conductivity with the “1/2” law in the multilayer nanocomposite [(Co40Fe40B20)34(SiO2)66/C]47

Abstract

The temperature dependence of the longitudinal electrical resistance in the multilayer nanocomposites [(Co₄₀Fe₄₀B₂₀)₃₄(SiO₂)₆₆/C]₄₇ containing 47 amorphous metal–dielectric/carbon bilayers prepared by ion-beam sputtering and differing in the thickness of the carbon layer has been investigated. It has been found that the electrical conductivity of these multilayer structures has a hopping character with the Efros–Shklovskii law “1/2,” and the characteristic temperature depends linearly on the thickness of the carbon layer.