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In this note we shall present results of measurements of non-isothermal currents in non-prepolarized samples of polymethyl methacrylate (PMMA) and polytetrafluoroethylene (PTFE). It will be shown that the currents are associated with reorientations of dipoles due to temperature gradients existing during cooling and heating of the samples.
Short circuit thermally stimulated discharge [TSO) has been used as a technique to study trapping characteristics of a material(1). We have in mind experiments in which the sample is initially poled under constant applied voltage V0 through an ohmic contact, until a steady state current iS is reached. It was shown by Many and Rakavy that, for a single trap level and trapping time greater than the...
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