Piezo- and pyroelectric hysteresis in thin unipolar PZT films

abstract

Piezo- and pyroelectric hysteresis loops have been studied in unipolar lead zirconate titanate (PZT) films grown on silicon substrates. The PZT film compositions corresponded to the region of a morphotropic phase boundary. It is established that the degree of unipolarity (spontaneous polarization) in such films can reach a level that is close to the magnitude of residual polarization. Cyclic poling of samples in a strong electric field leads to a sharp drop of the residual polarization, which is related to the pinning of domain walls and the action of external tensile mechanical stresses on the film.

keywords

EXCESS LEAD-OXIDE; DETECTOR ARRAYS

subject category

Physics

authors

Kiselev, DA; Kholkin, AL; Bogomolov, AA; Sergeeva, ON; Kaptelov, EY; Pronin, IP

our authors

acknowledgements

This study was supported by the Ministry of Education and Science of the Russian Federation (project no. RNP 2.1.1.3674), FANI (project no. 02.513.11.3332), and the Portugal Foundation for Support of Science and Technology (grant no. SFRH/BD/22391/2005).

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