Thermal conductivity of niobium--titanium alloys in the normal and superconducting states

The thermal conductivity of niobium--titanium alloys with large proportions of the components and with various structural defects was studied in the temperature range from 4.2 to 30 /sup 0/K. The work was carried out in order to elucidate the scattering mechanisms for electrons and phonons in the normal and superconducting states. It was established that the low values of the conductivity and its concentration dependence are determined by the small value of the electronic component. The differences in the temperature variation of the thermal conductivity in the superconducting state are determined by the phonon component. The scattering of phonons depends strongly on concentration and on the physical state of the specimen.