Vol. 38, Issue 1, pp. 25-29 (2008)

Abstract

Frequency dependences of imaginary part of the dielectric response ε'(f) of SiO₂–NaNO₂ nanocomposite, prepared by embedding of sodium nitrite into porous glasses with 7 nm average pore diameter, have been studied within a temperature range of 360–520 K. It has been found that the spectrum S(ω) = ε'(f)/f contains the component ~1/f^α, where α is a coefficient indicating the dynamical heterogeneity of dipoles. Peculiarities of the temperature dependence of α are discussed.