Hall-effect studies of Y1−xPrxBa2Cu3O7 crystals

Abstract

We report the in-plane resistivity and Hall effect of ${\mathrm{Y}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Pr}}_{\mathit{x}}$ ${\mathrm{Ba}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_7$ crystals (0≤x≤1). We find that the anomalous temperature dependence of the normal-state Hall coefficient persists up to x=0.55, at which point the superconductivity is destroyed. The Hall cotangent (${\mathrm{\sigma }}_{\mathit{x}\mathit{x}}$/${\mathrm{\sigma }}_{\mathit{x}\mathit{y}}$) follows cot${\mathrm{\Theta }}_{\mathit{H}}$≊${\mathit{AT}}^2$+γ(x), consistent with recently reported results for ${\mathrm{YBa}}_2$ ${\mathrm{Cu}}_{3\mathrm{-}\mathit{x}}$ ${\mathrm{Zn}}_{\mathit{x}}$ ${\mathrm{O}}_7$ crystals. Our results suggest that Pr doping introduces localized magnetic moments into the ${\mathrm{CuO}}_2$ planes. These moments act as scattering centers for charge carriers and contribute to the suppression of superconductivity.