MHz, a Novocontrol Concept 80 broadband dielectric spectrometer was used while a rootmean-square (rms) sinusoidal voltage amplitude of 100 mVrms was applied. The temperature in the BDS 1200 sample cell was controlled using a QUATRO cryosystem while the samples were measured under a steady N2 stream between -60 °C and 180 °C in 20 °C steps.