Crystallization-water-stimulated dynamic conductivity

In water-molecule-doped barium peroxide and barium oxide, a step increase i n the dynamic conductivity to similar to 10(-3) Omega (-1) cm(-1) was found . The increase is observed when water molecules are present in two nonequiv alent states in the lattice, with concentrations of the molecules n(t) of g reater than or equal to 2.2 x 10(21) cm(-3). At n > n(t), the conductivity does not depend on the number of molecules in the lattice but is temperatur e-dependent, obeying the law sigma>(*) over bar * (T) = C(1)exp(-E-1/kT) C(2)exp(-E-2/kT). The run of the sigma>(*) over bar * (n, T) curve is expla ined by trapping electrons that result from H2O dissociation and by two sor ts of carrier jumps between localized and delocalized states. (C) 2000 MAIK "Nauka/Interperiodica".