Fs. Da Rocha et al., Specific heat and electronic structure of Heusler compounds Ni2TAl (T = Ti, Zr, Hf, V, Nb, Ta), PHYSICA B, 269(2), 1999, pp. 154-162
Low-temperature specific heat measurements (3.2 to 10.3 K) of Ni2TAl (T = T
i, Zr, Hf, V, Nb, Ta) Heusler compounds are presented. Experimental data ar
e well described by the electronic and Debye lattice specific heat contribu
tions, plus one Einstein term. The electronic structure of the compounds is
calculated using the LMTO-TB method. The experimental to theoretical ratio
s (R) of the electronic specific heat coefficient (gamma) were determined f
or the isoelectronic compounds corresponding to Ti and V. The electron-fono
n coupling constants (lambda) were extracted from these R values. A simple
estimate of the elastic constant ratio is also made. (C) 1999 Elsevier Scie
nce B.V. All rights reserved.