a1 Laboratoire National des Champs Magnéetiques Intenses (UPR 3228 CNRS, INSA, UJF, UPS), 143 avenue de Rangueil, F-31400 Toulouse, France
a2 Institute of Problems of Chemical Physics, RAS, 142432 Chernogolovka, MD, Russia
De Haas-van Alphen oscillations of the organic metal θ-(ET)4ZnBr4(C6H4Cl2) are studied in pulsed magnetic fields up to 81 T. The long decay time of the pulse allows determining reliable field-dependent amplitudes of Fourier components with frequencies up to several kiloteslas. The Fourier spectrum is in agreement with the model of a linear chain of coupled orbits. In this model, all the observed frequencies are linear combinations of the frequency linked to the basic orbit α and to the magnetic-breakdown orbit β.
(Received April 26 2012)
(Revised July 24 2012)
(Accepted August 28 2012)
(Online publication October 01 2012)