Investigations of the molar heat capacity at low temperatures in the TiH x system

Results from heat capacity measurements in the temperature range 1.8–10 K on TiH x samples with different x values are communicated. From the γ coefficients of the electronic heat capacity the dependence of the density of states N(E F) on the x value for the cubic and the tetragonal TiH x phases is discussed, and is compared with similar results from susceptibility measurements. The estimated value for the electron-phonon interaction parameter λ excludes superconductivity for TiH x . An additional lattice contribution to the heat capacity of TiH x samples with x < 1.7 was observed and seems to be related to a low-frequency anomaly in the phonon spectra.