P. Fertey et al., FIELD-INDUCED SPIN-DENSITY-WAVE TRANSITIONS AND RAPID OSCILLATIONS OBSERVED IN THE MICROWAVE SURFACE IMPEDANCE OF (TMTSF)(2)CLO4, Physical review. B, Condensed matter, 57(22), 1998, pp. 14357-14365
We report microwave surface impedance measurements performed in the re
laxed state of the quasi-one-dimensional organic conductor (TMTSF)(2)C
lO4 at 16.5 GHz in a magnetic field applied along the hard axis (c) d
irection. The transition from the metallic to the field-induced spin-d
ensity-wave (FISDW) state is not as sharp as it:is generally observed
in the de regime, but the phase diagram is in very good agreement with
; existing data. An enhanced ac conductivity is measured in the FISDW
phases, which should reflect the contribution of the collective mode.
The rapid oscillations of the microwave magnetoresistivity appear in b
oth the metallic state and/or in the FISDW phase. The deduced frequenc
y (260 T) and the temperature dependence of the rapid oscillation ampl
itude in the normal and condensed states are consistent with reported
de results. A frequency dampening of the amplitude that is different i
n the two phases is, however, observed compared to de data;its possibl
e origin is discussed and confirms the different origin of the two mec
hanisms.