Density-of-state effects in the low temperature properties of TiBe2

The importance of exact theoretical and experimental determination of the band structure near E_F for an understanding of the properties of TiBe₂ is pointed out. Precise density-of-state data, obtained from ab-initio self-consistent band calculations, are used to determine low temperature variations in the susceptibility χ and specific heat γ. The influence on the field and temperature variations on χ is striking and qualitative agreement with experiment is possible without invoking spin-fluctuations.The field and temperature variations of γ are important enough to be considered, but are smaller than for χ and considerably smaller than observed experimentally by Stewart et al. Thus evidence of spin-fluctuations are more convincing when extracted from γ-data than from χ-data.