This article is cited in 14 papers

Ferroelectricity

Internal field and self-polarization in lead zirconate titanate thin films

V. V. Osipov^ab, D. A. Kiselev^c, E. Yu. Kaptelov^b, S. V. Senkevich^b, I. P. Pronin<sup>b

a</sup> Herzen State Pedagogical University of Russia, St. Petersburg
^b Ioffe Institute, St. Petersburg
^c National University of Science and Technology «MISIS», Moscow

Abstract: It has been shown that 300-nm-thick polycrystalline films of lead zirconate titanate (PZT), the compositions of which correspond to the region of morphotropic phase boundary, undergo anomalous changes in the composition and the microstructure as the annealing temperature increases. This causes substantial variations in the dielectric and piezoelectric responses, the spontaneous polarization and the internal field value. It has been demonstrated that the self-polarization varies nonmonotonically with increasing the internal field and is characterized by a threshold effect. The role of excess lead oxide and its influence on the formation of the self-polarization and the change in the effective permittivity of the ferroelectric layer has been discussed.

Received: 11.03.2015

 English version: Physics of the Solid State, 2015, 57:9, 1793–1799

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