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Structural contribution to the ferroelectric fatigue in lead zirconate titanate ceramics

2014; American Physical Society; Volume: 90; Issue: 9 Linguagem: Inglês

10.1103/physrevb.90.094113

1550-235X

Manuel Hinterstein, Jérôme Rouquette, Julien Haines, Philippe Papet, Julia Glaum, Michael Knapp, J. Eckert, Mark Hoffman,

Acoustic Wave Resonator Technologies

Many ferroelectric devices are based on doped lead zirconate titanate (PZT) ceramics with compositions near the morphotropic phase boundary (MPB), at which the relevant material's properties approach their maximum. Based on a synchrotron x-ray diffraction study of MPB PZT, bulk fatigue is unambiguously found to arise from a less effective field induced tetragonal-to-monoclinic transformation, at which the degradation of the polarization flipping is detected by a less intense and more diffuse anomaly in the atomic displacement parameter of lead. The time dependence of the ferroelectric response on a structural level down to 250 \ensuremath{\mu}s confirms this interpretation in the time scale of the piezolectric strain response.