Pa. Metcalf et al., LOW-TEMPERATURE ELECTRONIC AND MAGNETIC-PROPERTIES OF SINGLE-CRYSTAL NI3S2, Physical review. B, Condensed matter, 50(4), 1994, pp. 2055-2060
Electrical transport is measured for a crystal and polycrystalline sam
ples of Ni3S2. The samples display metallic behavior with the relative
resistance decreasing by more than two orders of magnitude upon cooli
ng from 300 to 4.5 K. Low-temperature heat-capacity data are obtained
by the quasiadiabatic heat-pulse method. The electronic-heat-capacity
constant is determined to be 2.7 mJ/K2 Mol(Ni). The magnetic measureme
nts on single-crystal and polycrystalline samples yield a mass magneti
c susceptibility of 0.3 X 10(-6) emu/g [0.4 X 10(-8) M3/g], which is e
ssentially temperature independent. The Pauli paramagnetic susceptibil
ity is determined to be 5.0 X 10(-5) emu/mol(Ni) [6.3 X 10(-10) M3/Mol
(Ni)], corrected for the underlying diamagnetism. Results of the elect
rical transport, magnetic, and heat-capacity measurements are used to
characterize the electronic structure. Application of the standard the
ory of electron-correlation phenomena shows that Ni3S2 may be categori
zed as a good metallic conductor for which magnetic instabilities and
electronic interactions are of marginal importance.