Suppressed polar distortion with enhanced Curie temperature in in-plane 90°-domain structure of a-axis oriented PbTiO3 Film

Abstract

PbTiO3 thin films were epitaxially grown on (001) KTaO3 single crystal substrates by metalorganic chemical vapor deposition. The coherent epitaxial growth introduced a large in-plane tensile strain to the PbTiO3 film. This tensile strain increased TC and directed the polarization to one of the in-plane ⟨100⟩ axes below TC, resulting in the formation of perfect a1/a2/a1/a2 domain structure. We found that the polar distortion is appreciably suppressed in such a1/a2/a1/a2 domain structure while TC is enhanced due to the strain.

Metal–ferroelectric supercrystals with periodically curved metallic layers

“…The superlattice Bragg peak on the crystal truncation rod exhibits a four-fold splitting, typical of in-plane twinning (so-called a 1 /a 2 domains). 16 The domain structure reflections, however, show only two of the four peaks. For satellite peaks along only the peaks at lower are present, indicating that regions of the sample with modulation along [100] pc have their long axis (and hence polarisation) along that direction.…”

“…Conversely, only the two peaks at higher are observed for domain structure reflections along , indicating that the in-plane polarisation components are along [010] pc for regions with a modulation along [010] pc . 16 Piezoresponse force microscopy imaging of flux-closure domain structure To directly image the domain structure, we perform PFM measurements on a PTO 22 /SRO 5 superlattice where the top layer is PbTiO 3 , rather than SrRuO 3 . Although the electrostatic boundary conditions for this topmost PbTiO 3 layer are not the same as for those within the superlattice, we expect the strong elastic interactions between the layers that lead to the out-of-plane coherence of the domain structure to act equally on the topmost PbTiO 3 layer and force the same ferroelastic domain pattern.…”

Tensor factorization for elucidating mechanisms of piezoresponse relaxation via dynamic Piezoresponse Force Spectroscopy

“…As a model system, we have chosen a 700 nm-thick PbTiO 3 thin film grown by chemical vapor deposition on (001) KTaO 3 substrates with an SrRuO 3 conducting buffer layer; this film displays a dense polydomain structure as previously reported 69,70 . The PFM was performed using a commercially available atomic force microscopy (Cypher, Oxford Instruments) fitted with an interferometric displacement sensor.…”

Fabrication of Tetragonal Pb(Zr,Ti)O3Nanorods by Focused Ion Beam and Characterization of the Domain Structure

“…∆ /2 represents the rotation angle of PZT lattice respect to the cubic phase, which is called "clapping angle" [19,20]. As can be seen in Fig.…”