Pressure dependence of field induced SDW states of (TMTSF)2ClO4 from the magnetoresistance at 1.5 K

Abstract

We report magnetoresistance measurements for single crystals of the organic conductor (TMTSF) 2 ClO 4 at pressures up to 1.5 kbars, at 1.5 K in fields up to 11.4 T along the c*-direction. It is found that both the threshold field for the onset of the spin density wave (SDW) state and the other characteristic fields, which probably represent SDW-SDW transitions, increase strongly with pressure. In addition the pressure dependence of other quantities, the anion ordering temperature, magnetoresistance and resistivity in the metallic state are briefly reported Etude experimentale sur monocristaux pour des pressions jusqu'a 1,5 kbars et des champs magnetiques jusqu'a 11,4 T, appliques selon l'axe c: le champ seuil correspondant a l'apparition de l'etat d'onde de densite de spin et tous les autres champs caracteristiques, probablement lies a des transitions entre etats d'onde de densite de spin, augmentent rapidement avec la pression. Temperature de mise en ordre des anions, magnetoresistance et resistivite dans l'etat metallique