Scientific article
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Monodomain to polydomain transition in ferroelectric PbTiO3 thin films with La0.67Sr0.33MnO3 electrodes

Published inApplied physics letters, vol. 90, no. 5, 052907
Publication date2007

Finite size effects in ferroelectric thin films have been probed in a series of epitaxial perovskite c-axis oriented PbTiO3 films grown on thin La0.67Sr0.33MnO3 epitaxial electrodes. The film thickness ranges from 480 down to 28 A (seven unit cells). The evolution of the film tetragonality c/a, studied using high resolution x-ray diffraction measurements, shows first a decrease of c/a with decreasing film thickness followed by a recovery of c/a at small thicknesses. This recovery is accompanied by a change from a monodomain to a polydomain configuration of the polarization, as directly demonstrated by piezoresponse atomic force microscopy measurements.

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LICHTENSTEIGER, Céline et al. Monodomain to polydomain transition in ferroelectric PbTiO<sub>3</sub> thin films with La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> electrodes. In: Applied physics letters, 2007, vol. 90, n° 5, p. 052907. doi: 10.1063/1.2433757
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ISSN of the journal0003-6951

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