Figure 4
From: Electrical transport properties and Kondo effect in La1−xPrxNiO3−δ thin films
(a) Upturn component of the resistivity as a function of temperature for LPNO with x = 0.2. The dashed line is the curve fit using Eq. (7). (b) The difference in curves for x = 0.2 between the experimental data and theoretical fitting calculated based on Eqs. (7) and (8), respectively. (c) The Kondo coefficient \(\rho_{k}\) and \(\Delta \rho = \rho_{{1.7\;{\text{K}}}} - \rho_{\min }\) as a function of the Pr concentration x. (d) The conductivity component of the upturn as a function of temperature in the range of 1.7–40 K for x = 0.2. The solid line is the fitting curve using Eq. (5).
