Abstract

The magnetic field dependence of the SDW transition ( T SDW) in quenched (TMTSF) 2ClO 4 has been measured up to 27 T, with the field parallel to the c ∗ -direction. T SDW increases from 4.5 K in zero field up to 8.4 K at 27 T. The field dependence of T SDW has been calculated in the framework of the mean-field theory. As predicted, a quadratic behavior is observed at low field, followed by a saturation behavior. T SDW corresponding to the perfect nesting case is estimated to be 13.5 K. This means that the SDW phase of quenched (TMTSF) 2ClO 4 is strongly suppressed by the two dimensionality of the system.

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