Abstract
The π electronic system in the title charge-transfer salt undergoes a phase transition at 8 K from a paramagnetic metal to an antiferromagnetic insulator. Above 8 K, it is a metal with high electrical conductivity as far as the dc conductivity concerned. When a microwave electric field is applied, however, there appear anomalies in the real (conductive) and imaginary (dielectric) parts of the complex conductivity. What happens there? Here are presented quite unusual and novel phenomena in a “dielectric metal” in which are entangled three fundamental electronic functions, i.e., conductivity, magnetism and dielectricity.
