H-T behaviors of the transverse microwave conductivity of (TMTSF)2X crystals

We report a microwave study of the dielectric constant and resistivity of the quasi-one dimensional organic conductor (TMTSF)2PF6 along the intermediate conductivity axis b′. An anomalous temperature dependence of the resistivity is observed in the normal phase. Several anomalies appear on the temperature profiles of the dielectric constant and the conductivity in the spin density wave phase, which are sensitive to a magnetic field applied along the hard axis c*. These results are discussed and compared to the properties measured along the chain axis.