The exponential switching of the TGS crystal is assumed in earlier models to be accomplished by volume nucleation in the high field region and by the sidewise domain wall motion in the low field region. It is anticipated that the exponential switching of the TGS crystal is accomplished by domain wall motion in both, high and low field regions, with different values of the activation field. The high field region is described by the Miller and Weinreich model. The low field region behaviour is fully determined when the two‐dimensional nucleus growth rate is taken into account. In all previous models the layer reversing time is anticipated to be proportional to the switching time. The proportionality has been never proved, however. Experiments are performed for the regular, partially stabilized domain structure in order to shift all the domain walls by an equal number of layers. On the basis of the obtained results the layer reversing time, the quantity which appears in all model calculations, is calculated.
A measuring method is presented that allows the determination of the electric charge transferred during a metal-polymer contact in the presence of an external or internal field, the latter being produced by the charges that are transferred to the polymer. The polymer is used in the form of grains of about 1 mm diameter which oscillate in an electric field between two metal electrodes. Each time the grains collide with these electrodes a transfer of electric charge takes place which causes a change in the mobility of the grains. This change in mobility shows a pronounced dependence on the work-function of the metal electrode, when the electric field produced by the charges deposited on the polymer grains is properly taken into account.
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