Cooling rate dependence of rapid oscillations in deuterated (TMTSF)2ClO4 at high magnetic fields

The transverse magnetoresistance of deuterated (TMTSF) 2 ClO 4 for various cooling rates has been measured, with the field up to 28T parallel to the lowest conductivity direction c*. We describe the cooling rate dependence of rapid oscillations (RO) in the magnetoresistance inside the spin-density-wave (SDW) and the field-induced SDW (FISDW) state. We have found that two different RO in the semimetallic FISDW phase of relaxed (TMTSF) 2 ClO 4 became undistinguishable, with increasing cooling rate.