Hall effect studies of the mixed and normal states of Y1 − xPrxBa2Cu3O7 − δ single crystals (0 ≤ x ≤ 1)

Abstract Hall effect measurements on single-crystal specimens of Y 1 − x Pr x Ba 2 Cu 3 O 7 − δ (0 ≤ x ≤ 1) reveal a “negative Hall anomaly” below T c , in the superconducting state. The depth Δ the negative Hall signal scales with T / T c and the maximum value of Δ decreases linearly with x and vanishes at x ≈ 0.24. These results show that the sign anomaly is not consistent with models that invoke pinning to explain this effect, and suggest that the negative anomaly could have an intrinsic origin. Hall effect measurements in the normal state show that the cotangent of the Hall angle can be described by cot Θ H = AT 2 + B with both A and B increasing linearly with decreasing T c , in agreement with recent reports on Y 1 − x Pr x Ba 2 Cu 3 O 7 − δ thin films.