Abstract

Hall resistance measurements for the quasi-one-dimensional conductor (TMTSF) 2ClO 4 have been performed in the high magnetic field spin-density-wave (SDW) phase. In a wide magnetic field region up to 30 T, rapid oscillation (RO) is found in the Hall resistance. In the SDW phase below 25 T, where the Hall resistance is quantized, the RO amplitude has a maximum around 2 K. At 25 T, the Hall resistance steeply decreases with increasing magnetic field, and then starts oscillating with the sign reversal. The RO amplitude around 28 T monotonically increases with decreasing temperature, and decreases around 1 K. A possible mechanism of the Hall resistance oscillation around 28 T is proposed.

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