ELECTRICAL AND MAGNETIC-PROPERTIES OF DED SALTS

The temperature dependence of the electrical resistivity of (DED)(2)PF 6(THF)(2), where DED is thiadiazoleethylenedithiodiselenadithiafulvale ne, is metallic down to similar to 20 K. At lower temperatures the res istivity rises proportionally to the logarithm of temperature, followe d by a saturation of the resistivity upturn at around 1 K. The magneti c susceptibility exhibits Curie-like behavior down to similar to 20 K, and chi T suddenly goes towards zero at lower temperatures. Such beha viour indicates that this salt could be a rare example of 'purely orga nic' systems whose electrical behavior at low temperatures might be be st explained as a result of Kondo effect.