Abstract
Measurements of the proton spin-lattice relaxation rate (T1)-1 in the quasi-one-dimensional organic charge transfer salt quinolinium (TCNQ)2 are reported over the magnetic field (H) range 1.2–10 kOe and the temperature (T) range 0.03–55 K. In the low temperature range (defined by gμBH ⪆ kT) the relaxation shows an activation energy type of behavior; T-11 = B exp [-ϵ(H)/kT], B = (15.0 ± 2.5) sec-1, and the activation energy (ϵ) is given by ϵ = AHδ, with δ = 1.65 ± 0.10 and A = (1.76 ± 0.34) x 10-2 K (kOe)-1.65. The mechanism responsible for this behavior is not yet identified.
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