ORGANIC CONDUCTORS IN HIGH AND TILTED MAGNETIC-FIELDS

We review some of the unique properties exhibited by the organic super conductors at high magnetic fields with special emphasis on the magnet ic field induced spin density waves (FISDWs) and the anomalous behavio r of the magnetoresistance at ''Magic Angles'' where the field drives electron motion commensurate with the reciprocal lattice. We compare a nd contrast the behaviors of the sister salts (TMTSF)2PF6 and (TMTSF)2 ClO4 at these Lebed magic angle resonances for titled fields in the b- c plane (perpendicular to the most highly conducting direction) and we report the discovery of a new angular dependent phenomena for fields in the a-c plane. Unlike the purely geometrical resonances previously found, this new effect provides the first way to make direct quantitat ive measurements of the band structure parameters on the open orbit sh eets of the quasi-one-dimensional Fermi surface.