Fermi surface in organic metal (ET)/sub 3/CuCl/sub 4/*H//sub 2/0

Summary form only given. The behaviour of the magnetoresistance has been studied in organic quasi - two dimensional metal (ET)/sub 3/CuCl/sub 4/*H//sub 2/0 . Shubnikov de Haas oscillations have been observed at the magnetic field directions near H/spl par/c*. The oscillations frequency at H/spl par/c* equals 45T that corresponds approximately to 1% of the first Brillouin zone cross section. The angle dependence of the oscillations frequency allows to image at least the part of Fermi surface in the form of cylinder with axis alone c*. The angle dependence of the magnetoresistance in (ET)/sub 3/CuCl/sub 4/*H//sub 2/0 has very unusual strong asymmetric form. The reasons of such behaviour are discussed.