Abstract
We have measured the Hall effect of the single crystalline CeAl2 under high pressure up to 3 GPa. An anomalous Hall effect was observed at high pressures. The Hall coefficient RH at 0.1 GPa is positive (RH ∼ 1.7×10−9 m3/As). It decreases smoothly with increasing pressure below 2 GPa, but rapidly above 2 GPa. The sign of the Hall coefficient is found to change from positive to negative as pressure increases. These results suggest a pressure-induced crossover in the electronic state around 2.7 GPa.
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