The complex permittivity of films of polyether ether ketone (PEEK) has been investigated over a wide range of frequency. There is no relaxation peak in the range of 1Hz to 10 Hz but in the lowfrequency side (10 Hz) there is an evidence of a peak that also can be observed by thermally stimulated discharge current measurements. That peak is related with the glass transition temperature (T g ) of ...

Charge transport mechanisms governing DC resistance degradation in ferroelectric films are influenced by defects, particularly oxygen vacancies. This paper demonstrates that vacancies migrate lead zirconate titanate (PZT) under a bias field and contribute to degradation. Model PZT thin were developed which the concentration distribution of controlled via (a) changing dopant type from 1%–4% Mn (...