2007/04/18 by Ho Nyung Lee, Serge Nakhmanson, Serge M. Nakhmanson +4 · 3 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Chemistry #Condensed matter physics #Crystallography #Dielectric #Epitaxy #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Layer (electronics) #Materials science #Multiferroics and related materials #Nanotechnology #Optoelectronics #Physical chemistry #Physics #Polar #Polarization (electrochemistry) #Strain (injury) #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.98.217602
published as Phys. Rev. Lett. 98, 217602 (2007). · 4 pages, 3 figures
arxiv created 2007/04/18 · openalex publication_date 2007/05/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A combined experimental and computational investigation of coupling between polarization and epitaxial strain in highly polar ferroelectric PbZr(0.2)Ti(0.8)O3 (PZT) thin films is reported. A comparison of the properties of relaxed (tetragonality c/a approximately 1.05) and highly strained (c/a approximately 1.09) epitaxial films shows that polarization, while being amongst the highest reported for PZT or PbTiO3 in either film or bulk forms P(r) approximately 82 microC/cm(2)), is almost independent of the epitaxial strain. We attribute this behavior to a suppressed sensitivity of the A-site cations to epitaxial strain in these Pb-based perovskites, where the ferroelectric displacements are already large, contrary to the case of less polar perovskites, such as BaTiO3. In the latter case, the A-site cation (Ba) and equatorial oxygen displacements can lead to substantial polarization increases.