Correlation between switching and fatigue in PbZr0.3Ti0.7O3 thin films

Fast pulse switching experiments with variable width and amplitude of the write pulse were performed on PbZr0.3Ti0.7O3 thin films and the results were correlated to fatigue measurements with varying frequency and amplitude of the fatigue signal. It was found that small amplitudes in combination with a small pulse width of the write pulse does not provide sufficient switching of the ferroelectric film. Furthermore, for the fatigue measurements, it is shown that the degree of switching caused by the fatigue excitation signal strongly influences the fatigue results. In the case of complete switching, the fatigue behavior is found to be independent of the fatigue frequency and only the number of switching cycles is decisive for the polarization decrease. (C) 2000 American Institute of Physics. [S0003-6951(00)02535-3]

Условия формирования и геометризация средне-позднеоксфордских коллекторов месторождений Казанской группы (юго-восток Нюрольской мегавпадины): автореферат диссертации на соискание ученой степени кандидата геолого-минералогических наук: спец. 25.00.16

Free ferroelectric nanoparticles in the order of 10 nm undergo a size driven phase transition into a paraelectric phase. However, in all applications, especially in ferroelectric random access memories, ferroelectric nanograins are integrated into a circuit. They are therefore exposed to new electromechanical boundary conditions e.g. substrate strain and screening of the depolarization field in the electrodes. Carefully adapted to the respective material, some of the extrinsic effects can be used to stabilize ferroelectricity and to shrink the ultimate size. The system performance is very sensitive to the fabrication and processing procedures