Abstract
Abstract Antiferromagnetic resonance has been observed in the two Bechgaard salts, (TMTTF)2SbF6 and (TMTTF)2SCN, below 7 and 9 K, respectively. For the thiocyanate the spin-flop field is found to be at 4.7 kOe, and the easy axis is near the crystallographic b' direction. The upper zero field mode is estimated to lie at approximately 6 kOe. The analysis for the SbF6 salt is more difficult because the easy magnetic axis does not coincide with a principal crystallographic direction, and because the spin-flop field is less than 3.3 kOe.
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