PECULIARITIES IN THE EFFECT OF HYDROGEN ON CDW TRANSITION IN NBSE3

The influence of intercalated hydrogen concentration on the physical p roperties of NbSe3 is investigated. The mass-spectrometric analysis re veals a nonlinear dependence of hydrogen extraction from the crystal s tructure on the saturated pressure. Resistive measurements make it pos sible to study the concentration dependence of the temperature T-CDW c orresponding to a phase transition accompanied with the formation of a charge density wave (CDW) and temperature dependence of CDW pinning t hreshold fields, A metal-semiconductor phase transition is observed fo r certain concentrations of intercalated hydrogen. All the measurement s are made in the temperature range of the first CDW transition (90-30 0 K). (C) 1997 American Institute of Physics.