Abstract
The longitudinal ρ xx and Hall resistivity ρ xy of Y 0.8Ca 0.2Ba 2Cu 3O 7− δ thin film were measured in different magnetic fields up to 10.0 T. The anomalous sign reversal and a second sign reversal were observed in the overdoped sample. A scaling law, ρ xy ∝ ρ xx β with β = 1.7 ± 0.1, was determined for the field above 1 T. The experimental results indicate that the first sign reversal and the scaling law may have no close connection with each other.
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