Characterization of the Microstructural and Piezoelectric Properties of PbTiO₃ Thin Films Synthesized by Liquid-Phase Deposition

Abstract

The microstructure and the ferroelectric properties of mirrorlike polycrystalline PbTiO3 thin films were studied as a function of the film thickness. Highly uniform PbTiO3 films were deposited onto LaNiO3-buffered (100) Si substrates by liquid phase deposition at temperatures as low as 45 °C. The as-deposited films are amorphous and can be easily converted into single phase PbTiO3 thin films upon a heat treatment at 750 °C in air for 6 h. X-ray diffraction patterns of the films have shown that they are chemically pure and adopt a tetragonal structure with the value of the lattice volume slightly smaller than that of the bulk material, indicating the presence of a compressive stress. This was furthermore confirmed by Raman spectroscopy by monitoring the variation of the positions of the soft optical phonon modes with the thickness of the films compared to that of those measured from a powdered sample. The E(1TO) and E(2TO) phonon modes undergo an upward shift and this shift decreases with increasing as the films get thicker indicating the presence of a compressive stress which decreases with increasing the film thickness. Piezoelectric force microscopy (PFM) and PFM bit-lithography experiments performed at room temperature allowed not only the visualization of the ferroelectric domain structure but also control the orientation of dipoles with an external electric field, thereby confirming the high quality of the films. The PbTiO3 films are formed by 180° ferroelectric domains and the static value of the piezoelectric coefficient d33 was found to increase with the film thickness, presumably as a result of the reduction of the stress and the substrate-induced clamping effect.

Ab initio studies on phonon, dielectric, and piezoelectric responses in perovskite‐like bismuth aluminate

“…According to the symmetry, the rhombohedral R 3c phase BiAlO 3 has eight independent piezoelectric tensor components that are calculated and listed in Table . The obtained value of e 33 is 4.116 C/m 2 , which is about the half of e 15 in PbTiO 3 . Except for e 15 , e 24 , e 31 , e 32 , and e 33 , all the other piezoelectric components are very small.…”

“…The obtained value of e 33 is 4.116 C/m 2 , which is about the half of e 15 in PbTiO 3 . 31 Except for e 15 , e 24 , e 31 , e 32 , and e 33 , all the other piezoelectric components are very small. From the point of ion's contribution to the internal-strain terms e iv,int , the biggest ionic dedication of 4.849 C/m 2 to e 33 is from O1 and O3 atoms (shown in Table 7).…”

Photo-Electrochemical Water Splitting Behaviour of CdSe Quantum Dots Sensitized Ferroelectric PbTiO3 Perovskite Heterostructure

“…Recently, PbTiO3 perovskite oxide is gaining more importance in the research due to the superior properties like ferroelectricity, piezoelectricity and magnetoresistivity [24][25][26][27][28]. The PbTiO3 perovskite is d(0) and d(10) metal oxide with ferroelectric polarization and demonstrated as excellent photocatalyst in organic dyes degradation and photocatalytic hydrogen generation [29][30][31].…”

A reduced graphene oxide/bismuth vanadate composite as an efficient piezocatalyst for degradation of organic dye

“…Piezocatalysis has been mainly reported for organic pollutant degradation [7]. ZnO [8], MoS 2 [9], NaNbO 3 [10], and PbTiO 3 [11], BaTiO 3 [12] etc., have already been reported for piezocatalytic applications. In the piezocatalysis field, much attention has given to piezocatalysis using BaTiO 3 catalyst.…”