Abstract
The effect of zinc doping on the mixed-state Hall effect in detwinned single crystals of YBa2Cu3O7 −δ has been studied. We observe a sign reveral of the Hall effect in crystals with a superconducting transition temperature (Tc) as low as 71 K. The Hall conductivity in the mixed state follows theC1/H+C2H field dependence. The absolute value of the coefficientC1 increases faster than (1–T/Tc) with decreasing temperature.C2 increases rapidly asT falls belowTc. The temperature dependence of the ratioC1/C2 scales approximately asT/Tc for different levels of zinc doping.
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