Abstract
Low-temperature electrical resistivity, specific heat, and magnetic measurements have been performed on the distorted perovskite . The electrical resistivity shows a linear temperature dependence at high temperatures and an dependence below ∼50 K. The static paramagnetic susceptibility is nearly Pauli-like with an additional small Curie-law contribution in the range 100–300 K, and shows stronger temperature dependence at lower temperatures. The specific heat can be represented as γT+β+δlnT at low temperatures. Both the Pauli magnetic susceptibility χ=5.1× emu/mol and the linear temperature coefficient of the specific heat γ=13.7 mJ/ mol are enhanced well above their electron gas values. The effective Stoner enhancement factor is S=0.58, i.e., far from the ferromagnetic instability. These results are interpreted in terms of a Fermi liquid composed of almost localized Ni 3d electrons. Thus, represents a correlated metallic system.
- Received 5 March 1992
DOI:https://doi.org/10.1103/PhysRevB.46.6382
©1992 American Physical Society