Structural, electronic, and magnetic properties of ${\mathrm{La}}_{\mathit{x}}$${\mathrm{Sr}}_{1\mathrm{-}\mathit{x}}$${\mathrm{VO}}_3$ (0.1≤x≤1.0)

We report on the properties of ${\mathrm{La}}_{\mathit{x}}$ ${\mathrm{Sr}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{VO}}_3$ which has a phase diagram which is similar to Sr-doped ${\mathrm{La}}_2$ ${\mathrm{CuO}}_4$ in that it too shows a composition-induced insulator-to-metal transition with strontium doping. In addition, the fact that the insulating compositions in the vanadium-based system are antiferromagnetic, as well as, the perovskite structure of ${\mathrm{La}}_{\mathit{x}}$ ${\mathrm{Sr}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{VO}}_3$, makes them candidates for a detailed study of their properties in order to gain greater insight into the mechanisms at play in the high-${\mathit{T}}_{\mathit{c}}$ cuprate superconductors. Magnetic susceptibility, x-ray powder diffraction, and ${}_{}{}^{51}{}_{}{}^{}\mathrm{V}$ NMR Knight shift and relaxation rates, ${\mathit{T}}_1^{\mathrm{-}1}$ and ${\mathit{T}}_2^{\mathrm{-}1}$, are reported as functions of temperature and composition in ${\mathrm{La}}_{\mathit{x}}$ ${\mathrm{Sr}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{VO}}_3$. A combined analysis of the susceptibility and the ${}_{}{}^{51}{}_{}{}^{}\mathrm{V}$ NMR data yields values of the density of states D(${\mathrm{\epsilon }}_{\mathit{f}}$) and for the enhancement of the uniform susceptibility. These are indicative of a strongly exchange-enhanced narrow d-band metal for x<0.7. No evidence was found for antiferromagnetic spin fluctuations in the metallic phase nor for superconducting behavior, in contrast to cuprate superconductors where neutron-scattering evidence shows antiferromagnetic spin correlations in the normal state of the superconducting compositions.