Imaging of defect-related charges in a Pb(Zr, Ti)O[sub 3] film

Takata, K.
January 2001
Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p664
Academic Journal
This letter presents results on imaging of charges causing the freezing of spontaneous polarization in a hydrogen-annealed lead-zirconate-titanate (PZT) film with platinum electrodes. It has been reported that the positive charges, produced by deoxidization of the PZT at the boundary with the platinum upper electrodes due to hydrogen annealing, fixed spontaneous polarization downward and thus greatly degraded remanent polarization. To date, such defect-related charges could not be observed directly. Imaging after removing the upper electrodes shows that the charges are located at the grain boundaries of the PZT and the charge density in the degraded region is much higher than that in the other region. © 2001 American Institute of Physics.


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